Jake

I'm working with the zero product rule and I've somehow lost my way on a certain problem pattern. (x+8)(x-3)= -30 Is the pattern and the answer in the book says -2 or -3, but when I do the problem... x²+5x-24= -30 x²+5x+6= 0 (x+6)(x-1) x= -6 x= 1 That is...

19 years ago

A plane leaves Boston at 10 am (Boston time) and flies non-stop to LA, 2700 miles away, at 580 miles per hour (mph). On the same route, a second plane is flying non-stop from LA to Boston at 620 mph. If the second plane lease LA at 10 am (LA time), how ma...

12 years ago

In long-run equilibrium, the perfectly competitive firm's price is equal to which of the following: short-run marginal cost minimum short-run average total cost marginal revenue all the above I think that it is all the above. Am I correct? I too would go...

18 years ago

Isn't a monopolistic competitor most likely to earn zero economic profits in the long run, due mainly to the assumption of easy entry and exit? I would argue no, a monopolistic competitor is likely to earn economic profits. Almost by definition, a monopol...

18 years ago

Can someone proofread this for me. I know I don't have the accents in- its for a presentation not a paper. Thanks. Hola. Me llamo Danilo. Soy de Massachusetts. Tengo catorce anos. Mis cumpleanos es el trece de febrero. Mi clase favorita es las ciencias po...

18 years ago

Thanks for the help. I really appreciate it. Does this look better? Hola. Me llamo Danilo. Soy de Massachusetts. Tengo catorce años. Mi cumpleaños es el trece de febrero. Mi clase favorita es las ciencias porque es muy interesante. No me gusta la clase de...

18 years ago

How did United States help the victims for genocide of Durdar? From what I read the main action that the U.S. has taken is to urge the U.N. to recognize that the situation in Darfur (note spelling) is a genocide and to send U.N. troops to help stop the at...

18 years ago

Why other countries (like Unites states, united nations) shold help victims in genocide of darfur? Because there are African nations. Couldn't African Nations help victims? Some African nations are helping the victims, but it doesn't look as though they a...

18 years ago

How United States and United Nation helping for Darfur? Please give me each exsample about Money, Aid and Military. And Is it enough? I already know US and UN gave Darfur some troopes, but I don't know Money and Aid. Essentially, the U.S. has not helped i...

18 years ago

How do I write arcsin4 in the form a+ib. I know the answer but do not Know how to get to it Take sinus of both sides: 4 = sin(a)cosh(b) + i cos(a)sinh(b) Equate real and imaginary parts. You then see that you can put a = pi/2. And it then follows that b =...

18 years ago

The original question I had was write arcsin4 in the form a+ib. I manage and understand how to get so far BUT How do I get from cosacoshb-isinasinhb=4 to 2m(pi)+/- iarccosh4 arcsin4 = a + b i ---> 4 = sin(a + bi) sin(a + bi) = sin(a)cos(bi) + cos(a) sin(b...

18 years ago

A diver descends from a salvage ship to the ocean floor at a depth of 35 m below the surface. The density of ocean water is 1.025x10^3 kg/m^3. a) Calculate the guage pressure on the diver on the ocean floor. b) Calculate the absolute pressure on the diver...

18 years ago

What would the interval be for a bar graph with the following data: 104,135,124,144,122 Highest number minus lowest number 144-104 = 40

18 years ago

i need to integrate: (secx)^4 dx let u = sec x dv =sec^3 x dx Start with this. Then, you will have to deal with the integral of sec. You should be able to solve it after a few steps. Looks a little messy.

18 years ago

Check my answers please! Thanks a lot. Five students reported that the previous night they slept: 7,8,7,10,9 hours. Calculate the sample varience and standard deviation. sample varience = 1346.5 standard deviation = 36.7 Consider this. Ths standard deviat...

18 years ago

Given that arg((z-1)/(z-2i)) = pi/4 describe the locus of P and sketch this on an argand diagram. Show that the point (1,3) lies on this locus. I know it is an arc subtended from the points (0,2) and (1,0) but I do not know how to find the centre of the c...

18 years ago

Find tan(3 theta) in terms of tan theta

18 years ago

Find tan(3 theta) in terms of tan theta Use the formula tan (a + b) = (tan a + tan b)/[1 - tan a tan b) in two steps. First, let a = b = theta and get a formula for tan (2 theta). tan (2 theta) = 2 tan theta/[(1 - tan theta)^2] Then write down the equatio...

18 years ago

a bacteria pop. grows exponentially. There are 1500 bacteria after 3 hours and 20,000 after 8 hours. ahving trouble finding the initial bacteria pop. thanks for the help In five hours the population get's larger by a factor 13 + 1/3-----> N(t) = N_0 * (13...

18 years ago

How to learn to do the formulas for finding speed, distnace, and etc.?? *w*w*w*.*a*s*k*.*c*o*m* hey i cant help but heres a hint just go 2 (go on the words w/ the stares around them )and ask the question *w*w*w*.*a*s*k*.*c*o*m* hey i cant help but heres a...

18 years ago

Can abs(28-7w)=7abs(w) be written as abs(w-4)=abs(w) and if so why surely it should be abs(4-w)=abs(w) can any one explain why I can just chane the signs Yes, it can be written that way. I don't see that you have changed any signs, you factored a postive...

18 years ago

For the transformation w=z^2, find the locus of w when z lies on the imaginary axis. I thought the locus would be a line along the real axis as I thought w= r^2 or -r^2 but the book says it has argument pi which would mean only on the negative real axis i...

18 years ago

For the transformation w=z^2, show that as z moves once round the circle centre O and radius 2, w moves twice round centre O radius 4. I am okay finding the radius and centre of the locus but how do I show it moves twice roundfor w for z turning once. See...

18 years ago

For the transformation w=(z+i)/(z-i) show that as z moves along the real axis, w moves along a circle centre O and radius 1 I do not know where to start changing it to polar form will help w=magnitude @ (arctan 1/z - arctan -1/z) where magnitude is sqrt (...

18 years ago

When you hold your hand palm-up, the atmosphere exerts a force of about 800 N on the palm of your hand. Comparing this force with I. the force on the back of the hand, II. the force on the palm when you are holding your hand vertical, III. the force on th...

18 years ago

Could someone please help me make this feature article flow and be enticeing to the reader? With winter on the horizon, many Australians are again facing the prospect of drought. If there isn’t a better than average rain season this year many Australian f...

18 years ago

Carminic acid,a naturally occuring red pigment extracted from the cochineal insect, contains only C,H,and O. It was commonly used as a dye in the first half of the nineteenth century. It is 53.66% C and 4.09% H by mass. A titration of the 0.3602 g sample...

18 years ago

<b>My objective is to find the molar mass of a gas. Is this the correct balanced equation for magnesium ribbon reacting with hydrochloric acid to form hydrogen gas?</b> 2Mg (s) + 2HCL (l) ----> H2 (g) + 2MgCl (aq) <b>Also, I'm required to find the mass of...

18 years ago

Posted by Jake on Sunday, September 23, 2007 at 1:08pm. My objective is to find the molar volume of a gas. Is this the correct balanced equation for magnesium ribbon reacting with hydrochloric acid to form hydrogen gas? 2Mg (s) + 2HCL (l) ----> H2 (g) + 2...

18 years ago

2 HCl (aq) + Ba (OH2) (aq) ----> BaCl2 + 2 H20 (l) deltaH = -118 kJ Calculate the heat when 100.0 mL of 0.500 M HCl is mixed with 300.0 mL of 0.100 M Ba(Oh2). Assuming that the temp. of both solutions was initially 25.0 degrees C and that the final mixtur...

18 years ago

If 142.38 g of l water at 21.7 degrees C is placed into a syrofoam cup with 174.36 g of ice at -27.5 degrees C what would be the final temperature of the entire contents at equilibrium? If it is partially frozen, how many g of the ice has melted? given va...

18 years ago

If you say "10 less than y". Does it mean 10-y or y-10. Which is correct and why?

17 years ago

Does anyone recall the mythical beasts that were described on the map in Ondaatje's Running in The Family, the chapter entitled Tabula Asiae? I left my book in my locker ;/

17 years ago

help? how do i calculate the heat of formation of a solid? i only know how to find the heat of formation of a liquid. here's what i have so far. delta t= 16.8 degrees c mass= 33.136 g cp = 4.184 j/g degrees c m cp delta t = -2329J (process is exothermic)...

17 years ago

Would it be appropriate to use a chi-square test for analysis of statistics in the following topics? •Number of Surgical Fatalities vs. U.S. State •Number of professional men’s soccer injuries vs. country of their team

17 years ago

I don't even understand how this question works. How do I solve it? A microwave oven heats by radiating food with microwave radiation, which is absorbed by the food and converted to heat. suppose an oven's microwave is 13.7 cm. a container w/ 175 mL of wa...

17 years ago

In an experiment using quantitative genetic approaches to investigate the evolution of butterfly eye-spots as a model system for understanding development. There are 3 groups of butterfly populations: small (mean diameter = 2.6 mm), intermediate (3.4 mm),...

17 years ago

I need to write a proposal of the possible traits we can actually measure in lab. What are some quantatitive traits of woodlice/isopod beside measuring their maximum speed.

17 years ago

I have a myth project assigned. I got lucky (or so I thought) and had the myth of Polyphemus. Wikipedia has it if anyone doesnt know it. There are three things that I need for my project: 1) The moral of the story. 2) How the story explains natural phenom...

17 years ago

The Christian Church helped preserve what traditions in the German kingdoms.

17 years ago

I ask because my TA recommended taking it next semester along with calc 3. My major is electrical engineering, and I might throw actuarial science into the mix too. So yeah, lots of math.

17 years ago

I was wondering if anyone could possible help me with this homework question? <b>The normal boiling point for acetone is 56.5 degrees C. At an elevation of 5300 ft the atmospheric pressure is 630. torr. What would be the boiling point of acetone (deltahva...

17 years ago

An ice cube tray contains enough water at 22.0 C to make 18 ice cubes that each have a mass of 30.0g. The tray is placed in a freezer that uses CF2CL2 as a refridgerant. The heat of vap of CF2CL2 is 158 J/g. What mass of CF@CL2 must be vaporized in the re...

17 years ago

How do i find the equation of a parabola in the form ax^2+bx+c?

17 years ago

If I have to make a solution with sodium bicarbonate (baking soda) how do i find the molarity and how do i correctly make the solution??? i.e. how do i prepare a solution of sodium bicarbonate with a molarity of 0.01?

17 years ago

A fish is homozygous dominant for bug eyes and his mate is heterozygous. show the possible offspring. i have BB BB Bb and Bb for the possible offspring, but how do I express this phenotypic ratio? would 4:0 correct?

17 years ago

Why is is it important to place your arm in a horizontal position rather than letting it hang down at your side when you take your blood pressure? Does everyone's heart create the same pressure? Why or why not?

17 years ago

I know that the phosphate [cells] and sodium barcarbonate [blood plasma] buffer systems are two examples of biological buffers; however, i am writing an essay for bio and i need a third example. does anyone know of a third biological buffer system?

17 years ago

The unit cells for most alkali metal halides are face-entered for both the cations and anions. In the case of NaCl the sodium ion is just a little too large for the chloride ions to touch each other along the face diagonal. The unit cell edge length is 56...

17 years ago

What are some images Robert Browning is trying to make us see in "A Woman's Lat Word" and "Rabbi Ben Ezra"? Is there a site where I can read an analysis of these two poems?

17 years ago

I'm in the same class as Catie, and we're working on the same lab; however, i chose a different approach. here's what i have below, your help is much appreciated. so i have X= g AgNO3 0.953-x = Ba(NO3)2 therefore .953-X-NO3=? so far I caluclated the % of...

17 years ago

In Lord Of The Flies, Jack leaves part of what they kill for the beast. What does this remind you of, in general?

17 years ago

The vapor pressure of water above a sugar water solution at 25.0 degrees C is 21.4 mmHg. What is the mole fraction of sugar in the solution? (assume sugar is a non-electrolyte, non-volatile solute and the vp of pure water at 25 degrees C is 23.8 mmHg) hel...

17 years ago

If the partial pressure of CO2 is 2.87 atm the soluability in H2O is known to be 4.68 M. What would be the soluability of CO2 in H2O if the partial pressure is increased to 7.60 atm? Assume the temp is held constant. would it work to set up a proportion f...

17 years ago

Sorry I have one other question that i'm unsure about. for the solution process of A (s)----> A (aq) the teacher demonstrates upon mixing A in H2O that the temp falls from 22 to 5 degrees C. The soluability of this solid is known to be 28g/100g H2O at 30...

17 years ago

Could you please review my work and see what i'm doing incorrectly? Thank you Given this information: CxHyOz (s) + O2 (g) ----> CO2 + H20 given: 2.165 g of the unknown hydrocarbon v = 1.868 L P = 130.2 kPa T = 65.0 degrees C g of H2O = 1.818 <b>a)find g H...

17 years ago

To gather enough nectar to make 1 pound of honey, a bee must visit 2 million flowers. How many flowers must a bee visit to make 64 ounces of honey?

17 years ago

Where was the Rorschach ink blot test created? I know it was created by a Swiss psychologist Hermann Rorschach but where?

17 years ago

When was the California Psychological Inventory created?

17 years ago

I need to find a map where I can highlight countries on it. It has to have Switzerland, Europe, and The United States included on it.

17 years ago

A 66.0 kg diver is on a diving board, which is 1.10 m above the water. He falls at a speed of 9.10 m/s. Calculate his kinetic energy as he hits the water. I know KE is 1/2mv^2, but how can I find KE when height is involved?

17 years ago

i'm having trouble balancing the redox reaction for the iodine clock lab. The redox reaction inovlves a hydrogen sulfite ion and iodate ion in an acidified solution. i have the final balanced equation, 5 HSO3 + 2 IO3 ---> I2 + 5SO4 + H20 + 3H but i'm havi...

17 years ago

I need 75 of these surveys filled out to do a regression analysis for Economics. Just answer the 10 easy questions for me please. 1. Do you exercise or work out on a regular basis? 2. Are you male or female? 3. Do you smoke? 4. How many carbonated soft dr...

17 years ago

How do I do the LCM?

17 years ago

If you shine an ultraviolet light on the metal ball of a negatively charged electroscope, it will discharge. But if the electroscope is positivelely charged, it won't discharge. Why?

17 years ago

If a cannonball and a BB have the same speed, which has the longer wavelength?

17 years ago

We don't notice the wavelength of moving matter in our common experience. Is this because the wavelength is extraordinarily large or extraordinarily small?

17 years ago

Does the uncertainty principle tell us that we can never know anything for certain?

17 years ago

the class president plans to randomly select a committee of three people from three boys and five girls. How many committees are possible?

17 years ago

5/2(x-1), 1/2x, 3/2(x-1)^2=?

17 years ago

Just a simple one... which symbol should I use to represent a strain gauge on circuit diagram? Thanks

17 years ago

Find the area between each curve and the x axis for the given interval. y=16x-x^3 from x = 0 to x = 4 Thanks ahead of time.

17 years ago

Who is roberto clemente?

17 years ago

chlorination of nitrobenzene under conditions of electrophilic aromatic substitution occurs? a. Faster than chlorination of benzene and gives a mixture containing mostly o- and p-chloronitrobenzene. b. faster than chlorination benzene and gives mostly m-c...

17 years ago

WHICH ONE OF THE FOLLOWING ALKYL HALIDES GIVES THE HIGHEST RATIO OF SUBSTITUTION TO ELIMINATION ON TREATMENT WITH SODUM ETHOXIDE IN ETHANOL 1-BROMOPENTANE 2-BROMOPENTANE 3-BROMOPENTANE 1-BROMO-2-METHYLBUTANE 2-BROMO-2-METHYLBUTANE

17 years ago

WHAT IS THE BEST COMBINATION OF REACTANTS FOR CH3CH2CH2CH2OCH3

17 years ago

I was wondering if someone know's aof a web-site that may be able to help me I have to look up the following and explian them also benefits and risks of them thanks ( Basically what effects good/bad have on Men's health) Epimedium Leaf Chinese Dodder Seed...

17 years ago

Is the LCM for xy, y3 = x3y3, y3

17 years ago

How do you solve the following equation x2 - 5x = 14 x2 - 5 x - 14 = 0 (x - 7) (x + 2) = 0 x = 7 or x = -2 How do I explain this to my son who was not taught this way???

17 years ago

a+6a-9=30

17 years ago

i can't find these patterns. my mom and dad tried to. first problem 64,__,___,___,32 second problems 61,___, ___, ___, 81

17 years ago

What bird is considered a sign of the coming spring?

17 years ago

Using only addition and subtraction, without changing the order of the digits, and having just three operations, form an equation out of 123456789 that equals 100.

17 years ago

estimate quotient and divide (how do you estimate the quotient? 552 divided by 71,520 I don't understand the steps.

16 years ago

a-D-glucose and b-d-glucose can best be described as? -diasteromers -constitutional isomers -different conformations -enantiomers -keto-enol isomers

16 years ago

Which is not correct? glucose is a reducing sugar glucose has six carbon atoms glucose undergoes mutarotation glucose is a disaccharide glucose is an aldose

16 years ago

which phenol is the most acidic? phenol 2-methyl-6-nitrophenol 3-methyl-5-nitrophenol 2,6-dimethyl-3-nitrophenol 2,4,6-trimethylphenol

16 years ago

what is the best synthesis of 2-methyl-2-pentene (CH3)2C=CHCH2CH3? 1.(CH3)2CHCH2CH2CH3+F2,heat 2. KOC(CH3)2 1.(CH3)2CHCH2CH2CH3+Cl2,heat2.NaOCH2CH3 1.(CH3)2CHCH2CH2CH3+Br2,heat2.NaOCH3 1.(CH3)2CHCh2CH2CH3+I2,heat2.NaOCH2CH3

16 years ago

what is the best combination for preparing CH3CH2CH2CH2OCH3 is CH3CH2CH2CH2OH+NaOCH3 CH3CH2CH2CH2ONa+NaOCH3 CH3CH2CH2CH2Br+NaOCH3 CH3CH2CH2CH2Br+CH3Br

16 years ago

The reaction of sec-butylmagnesium bromide with formaldehyde followed by hydrolysis yields? 2,2-dimethyl-1-pentanol 2-butanol 2-methyl-1-butanol 2-pentanol 2,2-dimethyl-1-propanol

16 years ago

C6H5NO2+? = C6H5N2Cl

16 years ago

Are any of the following a tertiary amine 2-methyl-2-butanamine N-Methyl-1-butanamine N-Methyl-2-butanamine

16 years ago

Explain why glucose undergoes mutarotation

16 years ago

Thanks, sir. This is what I did, could you tell me if its correct? given value 1.072 g/meter 1.072 g/m X .02 m [the magnesium ribbon was 2.0 cm] = 0.02144 gMg Then to find the moles of H2: 0.02144 g mg ( 1 mol Mg/24.31 g Mg) (2 mol H2/1 mol Mg) = 1.76 X 1...

18 years ago

The way I think of "range" is the possible values of the y-axis on your graph. The easiest way to see this is to actually enter the function into your graphing calculator and graph it out. In your example, you have a straight line with a slope of -1/3, so...

17 years ago

What do you mean by "how would be the answer"? The answer to this problem is 1.

17 years ago

a) Yes, you can probably tell because the activation energy gets lower and thus allow the reaction to speed up way faster than without a catalyst... it's kind of dumb to ask if in catalyst is involved in a CATALYZED reaction... b) No, the catalyst will ge...

17 years ago

Maybe re-wording this question will help you out. Find the distance between two points: a)(-4,3) and (5,-4) b)(-3,-2) and (3,5) I'm sure your teacher gave you this formula: d = sqroot [(x2 - x1)^2 + (y2 - y1)^2] where x and y are defined as (x,y) in the c...

17 years ago

Okay, to do all these problems relating to point coordinates. The first thing you do is to plot those points on the graph so you can have a clear picture of what it looks like. That's just a hint although you might be able to do this without plotting it,...

17 years ago

Okay, this one you really really should plot out the coordinates. It will give you an approximate orientation of the line. If plotted it out and realized that ST is a diagonal segment with a POSITIVE slope (meaning it goes up from left to right, that let...

17 years ago

All right... so you have two points (x,-1) and (3,11) this is correlating to (x1,y1) and (x2,y2)in the distance formula. d = sqroot [(x2-x1)^2 + (y2-y1)^2] Plug in the numbers and you'll have: 13 = sqroot [(3-x)^2 + (11-(-1))^2] 13^2 = x^2-6x+9 + 12^2 169...

17 years ago

I replied you, but I can't see it down here. Click on your first post of your question to view it.

17 years ago

Just plot out the two points and connect them and count the number of squares on your graphing papers to find the length. You should have 12 squares total in length if you drew in correctly because (8+|-4|) =12. Now you need to divide that into 4 equal pa...

17 years ago

No, I didn't say D is (3,-1). The question asks you for 3 points on the segment CD that will divide that segment to 4 pieces equally. I'm just saying that the CLOSEST point to CD is (3,-1) just to correct what drwls said. The 3 points on the segment CD ar...

17 years ago

13^2 mean "13 square" or "13 x 13" or "13 raise to the power of 2". You have to square both sides of the equation to cancel off the "square root" on the right side of the equation so you can figure out "x", not "square root of x" because in the distance f...

17 years ago

Efficiency can never reach 100% because there's always loss of energy during the process of carrying out work. One example is energy loss because they're converted into heat while operating.

17 years ago

1s2 2s2 2p6 3s2 3p6 4s2 3d10 4p6

17 years ago

Not 100% sure, but I say it's D. I think there are only 4 orbitals: s(2), p(6), d(10), f(18).

17 years ago

In glycolysis, Acetyl-CoA is recycled so it can be used again for another cycle or elsewhere for biosynthesis.

17 years ago

3^2 is where I get the +9 from... the -6x is from (-3x)+(-3x). Solution = (-2,-1),(8,-1).

17 years ago

huh? what is this? lol... 1/y-1/y = 0... then -3 = -3 duh?

17 years ago

umm... aren't they both contain DNA and DNA is made out of nitrogenous base and phosphate backbone? So I would say nitrogen and phosphorous.

17 years ago

Anything related to projectile is related to quadratic. Examples can range from shooting a bullet like the example above to a simple action such as throwing a baseball upward. You can use quadratic to figure out what is the maximum height your ball will g...

17 years ago

oh lol, first I looked at this question and I was like wow, this is impossible to do because I thought you were asking for the COMMON factor for all of those... in the case of factors of each individual #... it should take you less than 5 minutes to do th...

17 years ago

Im pretty sure its D because I think both A and C are needed and B sounds logical.

17 years ago

they have exoskeletons?

17 years ago

Thank you!

17 years ago

Damon I really don't understand please one hint.mt mom does not understand either

17 years ago

thanks

17 years ago

sorry, it would probably hep you to know that the objective is to calculate the percentage of silver and barium in the nitrate salt mixture. i know how to find the percentage once i get the grams, but i have no idea how to get the grams from this point. t...

17 years ago

Yes, I didn't want to use a second variable because my teacher wants us to use different approaches. i checked the molar mass of AgNo3 and it is 169.87, so thank you. I didn't notice that. the new factor would be: 107.87/169.87 = .635 i'm not quite sure h...

17 years ago

so the second equation would be: 0.635X + 0.526(0.953-X)=0.944 ????? 0.635X + 0.5013-.526X=0.944 0.109X/.109=0.4427/.109 x=4.061???? to three sig figs=4.06 is that the grams of BaCrO4???

17 years ago

that couldn't be right though because i only started out with .953 g and conservation of mass applies

17 years ago

this helped so much! thank you, i understand now.

17 years ago

thank you

17 years ago

Thats all the information i have

17 years ago

this is the question in the book, i don't understand either

17 years ago

Thanks. :)

17 years ago

Im an instructor at Axia and Im letting you know...for your own good: Do not plagiarized...do your own work or you will be expelled.

17 years ago

are the Cl, CH3, and H on opposite sides or on the same sides

17 years ago

by x in the first one did you mean OH

17 years ago

I would say temperature because increasing temperature would cause molecules speed up and increase volume and decreasing temperature usually decreases molecular speed and causes volume to decrease (except for water)

17 years ago

It is an imaginary line that goes around the center of the earth to separate the northern hemisphere (top) from the southern hemisphere (bottom)

17 years ago

yes

17 years ago

He is doing a book report. (Old school.) LOL

17 years ago

Are you trying to say this disproves the Associative property? because the associative property is only if the operation contains all and ONLY addition signs or all and ONLY multiplication signs. Not if it contains both.

16 years ago

well if you're trying to find the difference: 20 - (-10) = 20 + 10. So the difference is 30. You can just add it's opposite. Ex. -30 - -20. That = -30 + 20. therefore the answer is -10.

16 years ago

alpha-amino

16 years ago

Given: H3PO4(aq) + 3 NaOH(aq) yields 3 H2O(l) + Na3PO4(aq) change in H = -166.5 kJ What is the value for q (heat) if 4.00 g of NaOH reacts with an excess of H3PO4? Please can you explain to me HOW to do this, not just give me an answer? Thanks!

16 years ago

thank you, also i have to be able to sympathsize with the other side, but last time i wrote an essay and did that for this class, it sounded like i was for both sides. how do i make it so that i can strongly agree with 1 side, but also can understand wher...

16 years ago

should i add more information 2 my side....or equal information about both sides thanks

16 years ago

Well I didn't just copy and paste those even if it might look like it. And I only asked 2 questions. Anyway for the first one I am currently thinking that it is probably A or C? Tuxedo's aren't a necessity, yet they are a nice contribution, and the braver...

16 years ago

Ok the first one is B? The reason I was confused on it was because that all 3 of them could work. I just didn't know which one was best I guess. And with the other question, I'm still not sure but I think it was fear of Mohawk Revolt?

16 years ago

Ok I know now that the answer is If they left England, they would be Separatists instead of Puritans, and that bothered them. thank you

16 years ago

11. It is $20 to start, every hike, you are charged $2 more from the second company. If you divide 20 by 2, 10 will be even and at 11 it will be 2 $ more.

16 years ago

There are 32 people.

16 years ago

40 + 40 = 80 so 2 1/2

16 years ago

you all got it all wrong you idiots. And you schjool is a dump

16 years ago

um this was are first day of philosophy, so i don't know anything you just said bobpursley , i'm just confused in general...im not sure if i talk about that humans are what make up earth, and they have different purposes in life to obtain and stuff like t...

16 years ago

Doesn't the line go on forever, so how could you choose 3 points above it?

16 years ago

5 / 10 = ? / 20 Multiply the denominator by 2 to get 20. Multiply the numerator by the same number (2) to get 10. Answer: 10 / 20

16 years ago

To write a decimal as a percent, just multiply it by 100. 0.3246 * 100 = 32.46%

16 years ago

I'm not sure how to start it. I know I need to have a balanced chemical equation, so... KHC8H4O4 (aq) + NaOH (aq) --> H2O (l) + ???? Then once I figure this out, do I use the mass in each trial to find the moles of NaOH through stoichiometry. Then divide...

16 years ago

No, this is not a duplicate. The other question refers to molarity. This one is asking for molar mass of an unknown acid. For this question would I do the following... Start with the volume of NaOH then convert it to moles with the answer from the first q...

16 years ago

Thank you very much. The molarity of the NaOH solution is 0.162. So I did the following: 25.00 mL NaOH*(1 L / 1000 mL)*(0.160 mol NaOH / 1 L NaOH)*(1 mol CH3COOH / 1 mol NaOH) = 0.004 mol CH3COOH (0.004 mol CH3COOH / 5.00 mL) * (1000 mL / 1 L) = 0.8 M CH3...

16 years ago

typo... "The molarity of the NaOH solution is 0.160." The number in the calculations is correct.

16 years ago

For example, if I pick a point at random on the graph.. say (0.200, 184.3). Then R1 = volume H2 / mass Mg R1 = 184.3 mL H2 / 0.200 g Mg R1 = 921.5 mL H2 / g Mg for the next part it says "using the value of R1" so... R2 = (184.3 mL H2 / 0.200 g Mg) * (1 mo...

16 years ago

would i get a more accurate answer using the slope instead of a point at random?

16 years ago

does that mean he would take the view of any southern leader during the 1800s?

16 years ago

whatever that doesnt help goodbye

16 years ago

hi, i was wondering where you got: 20/2[2a + 19d] from, im in yr 11 but want to start revising a level because i want to get a phd in maths, so i just wanted to know where you got it from, if you could answer this, then thanks

15 years ago

we play

15 years ago

Haha thanks you're far to kind :)

15 years ago

What do you mean?

15 years ago

I'm not sure that's why i asked...im really confused

15 years ago

Hi i have to write an essay about The Sun Also Rises by Ernest Hemingway..i was wondering what some thesis statements would be.....is this an example of one: In this book the lost generation was a term that described how the main characters lived their li...

15 years ago

Would it be : The characters in the sun also rises are experiencing the negative after effects of war thus leaving them to be the lost generation....wait are they considered the lost generation or an example of the lost generation? im not sure

15 years ago

I know what the lost generation is.......im wondering if my thesis statement is ok though. While reading The Sun Also Rises by Ernest Hemingway, I noticed that the term Lost Generation has an important impact on the values and beliefs that characters such...

15 years ago

HOW DO I REVISE IT...IM ABOUT TO GO CRAZY like seriously im trying to ask for your help and you just keep saying revise it revise it...im so confused im so stressed and im going to go crazy in a minute..!

15 years ago

yeh i was leaning towards A thanks also i have 1 more question When selecting a medium for a report A) you should choose the ones that are most convenient. B) you should choose the ones that are most economical. C) your decisions should reflect your audie...

15 years ago

So does that mean its choice c?

15 years ago

seriously i have no idea i don't have time for jokes...im not trying to be rude but i don't need "smart aleck" remarks, i was trying to ask a serious question...thank you

15 years ago

thanks so much you're awesome sorry im just really stressed and i was getting frustrated at him

15 years ago

ALso 1. Speeches and oral presentations are much like other business messages in that A) they require similar planning. B) the size of the groups to which they are delivered is similar. C) the interaction between the audience and speaker is similar. D) th...

15 years ago

Well i don't know a lot of speeches deal with personal issues....but yeh busines ones yeh good point so would it just be A?

15 years ago

those are subscripts by the way F_fr_k is the force of kinetic friction and the all capital letters are greek leters

15 years ago

I believed this is correct after noticing my mistake Ok I'm here what do I do now 0 = (m_M r^2)/m_E + r^2 + 2(3.84403 m)r - (3.84403E9 m)2

15 years ago

sorry 0 = (m_M r^2)/m_E + r^2 + 2(3.84403 m)r - (3.84403E9 m)^2

15 years ago

sorry again 0 = (m_M r^2)/m_E + r^2 + 2(3.84403 E 8 m)r - (3.84403 E8 m)^2 sorry about that

15 years ago

thank you

15 years ago

so it's 2100 ft ?

15 years ago

amm i got an answer of 4.08 for the time in the air I divided 20/9.8=2.04x2=4.08 For the rise I do not multiply by 2 t right? I got answer of 20.4 I am very glad that you were able to help me with this problem

15 years ago

What is symmetric around the y-axis? This is confusing because I don't really know how to draw the solid. First it says the solid has the base of R. So does that mean R should be on the x-axis? But how do you find out the length of the side of the square?...

15 years ago

That's supposed to be a rectangular box, where the length is 8 m, the width is 4 m, and the height is 5 m.

15 years ago

I tried using free fall equations with no luck. I guess this isnt a free fall problem?

15 years ago

That reply was meant for a different question.

15 years ago

Tried using a free fall set up with no luck. Things like (-9.8)(10.1)+43.3

15 years ago

About 3. So your anwser would be A.

15 years ago

37.68

15 years ago

3.14

15 years ago

Yeh i agree with you about wikipedia, but my teachers lame. Trust me i wish i could get a new teacher. Marketing of prescription drugs actually sounds pretty interesting thanks!

15 years ago

I'm the one who posted the question... this is how I'm doing part A. I'm told it's the wrong answer, but I can't figure out what I'm doing wrong. I'm hesitant on going to parts B and C until I understand part A. Part A: Step one: I changed the mols of Al...

15 years ago

For #1 I think all three because there's hydrogen bonding between the O-H, there's dipole-dipole between C-H and there's Londond dispersion between the individual H. If that's the case, then all three would apply for #2 as well. Am I close?

15 years ago