hannah

This page lists questions and answers that were posted by visitors named hannah.

Questions

The following questions were asked by visitors named hannah.

please help me find the definition for unit rate. It depends upon what kind of unit. Go to www.google.com and type in unit rate. There is one source there for hotel unit rates, another for unit rates for the medical field, etc. You may also go to www.dict...

9+9=w w= 18...right? ............18......dumb...math 9+9=18, you dumbos.

what is an underwater plateau called?

what is a control ,variable, independent variable, experimental variabale, dependent variable

A 6 kg bucket of water is raised from a well by a rope. If the upward acceleration of the bucket is 1 m/s2, find the force exerted by the rope on the bucket of water.

what art movement is william morris associated with

Jenny's mom runs 3 miles 3 times a week . which number sentence can be used to find how many yards she will run in 1 day? A 3 x 3 x 1,760 B 3 x 3 + 1,760 C 3 x 1,760 D 3 + 1,760

please could someone help me . i need to write a front page newspaper article about queen mary 1 i need to include pictures and information . i`m having trouble finding pictures. thanks to all that help.

evaluate f(3/4) if f(x)= [1-2x]and identify the range of y=(x)-4 is either {y y > -4 or all are real numbers

find f(-1) if (x)= x2 - 6x/ x plus 2 the multiple choices are -5, -5/3, 7/3, 7 which one is it

the first equation of the system is muti plied by 2. by what number would you mutiply the second equation to elimi nate the x variable by adding? first: 6x - 5y equals 21 second: 4x plus 7y equals 15 and another one is the first equation of the system is...

Imagine that you have a 7.00L gas tank and a 4.50L gas tank. You need to fill one tank with oxygen and the other with acetylene to use in conjunction with your welding torch. If you fill the larger tank with oxygen to a pressure of 105atm , to what pressu...

How wide is North America from coast to coast?

how does a saturated lipid differ from a polyunsaturated one? Is a saturated covalently bonded to a protein molecule?

Calculate the enthalpy of the reaction shown below using the following equations. H2(g) + F2(g) 2 HF(g) (a) ΔH° = BE(reactants) - BE(products) (b) ΔH°rxn = nΔH°f(products) - mΔH°f(reactants)

For the reaction shown below complete the following calculations. H2(g) + C2H4(g) --> C2H6(g) (a) Estimate the enthalpy of reaction using the bond energy values in Table 9.4. (b) Calculate the enthalpy of reaction, using standard enthalpies of formation....

In triangle ABC, D is the centroid and M is the midpoint of segment AC. If BD=x+9 and DM=6, find MB.

The vertices of triangle ABC are A(2,2), B(3,-1) and C(0,1). Find the coordinates of the circumcenter. Answer choices:(23/14,3/14), (3/2,0) or (7/9,11/9)

what is a factor

is a monomial an expresion that dose not use addition and subtraction

what is a prime factoization

the gcf of : 40ccd,42c

factor expresions: 2+16y and 4-16m

how do u factor an expresion

Fill in the blanks with homonyms: Can you ___ a good authority to prove that the ____ of this ancient city was discovered by an American? The ___ reason why I believe corey worthy of so important an office is that she is a woman of _____. Since you are co...

The atmospheric pressure at the summit of Mt. McKinley is 554 mm Hg on a certain day. What is the pressure in atmospheres and in kilopascals? What are the conversions or formulas for this problem??

would the answer to this question be 0.004166667 meter per 1 minute? the helepolis could move at a speed of 0.00025 kilometers per hour. what was the speed in meters per minute?

my four factors add up to 48. I am a number between30 and 40. What number am I?

what is the study of substances containing carbon?

what i sused to cover toe nails and nails in ancient egypt?????PLZ HELP!

The diameter of a neutral neon atom is about 1.4 multiplied by 102 pm. Suppose that we could line up neon atoms side by side in contact with one another. Approximately how many neon atoms would it take to make the distance from end to end 1 cm? I got 2.4e...

how to set up or approach these 1. Calculate the mass in grams of iodine (I2) that will react completely with 48.9 g of aluminum (Al) to form aluminum iodide (AlI3). Do I need to find the mass as a whole for the entire compound, then convert? 2. The formu...

mary has a solution that is 60% alcohol and another that is 20% alcohol. how much of each should she use to make 100 milliliters of a solution that is 52% alcohol? please help, I don't understand how to do this problem!

what is the chemical formula for cadmium phosphate?

whats the correct formula for 1. rubidium selenide 2. potassium phosphate

what does coast mean???

is a pretzel topologically equivalent to a pencil, pipe,trophy or none of these?

The formula b=34a is used in New England to estimate the minimum furnace output, b, in BTUs, for a modern house with a square feet of flooring. a)Determine the minimum furnace output for a 16000 ft^2 modern house b)Solve for formula a

what are the namesofthe six resources?

if one elastic band holds 1800g, how many elastic bands would you need to suspend a 80kg adult?

how will you examine the relationship between acceleration and mass when you change the mass of an object while applying the same constant force?

what is the name of the ion Ti2(CrO4)3

de quien es la casa mean?

A room has dimensions 3.00 m (height) 3.70 m 4.30 m. A fly starting at one corner flies around, ending up at the diagonally opposite corner. (a) What is the magnitude of its displacement? (b) Could the length of its path be less than this magnitude? (c) G...

spelling rule: for words ending in one vowel and one consonant, - - - - - - the final consonant before adding a,e,i,o,u, or y

underline the base word for each word in the box. Then find and circle these base words in the puzzle. The answers will read down or across. Next, unscramble the shaded letters to make a word to complete rule below. shaded words are as follows plan,drip,t...

In the product F = qB (vectors), take q = 2 (neglecting the units of charge, q) and v = 2.0 i + 4.0 j + 6.0 k and F = 4.0 i + (-20 j) + 12 k . What then is B in unit-vector notation if Bx=By ?

A boat is traveling upstream in the positive direction of an x axis at 14 km/h with respect to the water of a river. The water is flowing at 9.0 km/h with respect to the ground (parallel to the boat). What are the (a) magnitude and (b) direction of the bo...

How do the GCF, divisibility and LCM connect to fractions

When dealing with GCF, LCM and divisiability do prime factorization help at all?

Simplify | –5| – |–3 – 3|

Rewrite the expression in the simplest form without parentheses: 6(18 – y)

what is the answer to this riddle. what should you say when u meet an angel

How do people choose where to settle and live ?

if the perimeter of a parallelogram is 132cm the longest possible length of a diagonal is less then ?

what is the percent is 2/6

how do you simplify 15/56?

How do I do this 4x +3= 2x+11

is the solution to 2x^2-4x+5... 1(+/-)((sqrt6)/2)i ??

how do u do 18t +12r over 3?

when Flour, water, sugar and other ingredients are combined and baked into a cakeis that a chemical change?

a)339 Cal to kilowatt-hours

3. Define proactive & retroactive inhibition. Create a memory strategy to help you remember & discriminate between them. Explain this strategy well enough so that a reader could learn to use it.

A 43 kg sample of water absorbs 343 kJ of heat. If the water was initially at 22.1°C, what is its final temperature? I got 1.9 but i think i didn't do it correctly

ok so I did a radiation and distance lab: this is my results: Distance(cm) Counts(30 sec) 0 1729 1 634 2 391 3 239 4 150 5 124 6 114 7 82 8 58 9 62 10 60 11 36 12 45 so it asks me to make new columns on excel titled the following:(note: the 2 and 3 are su...

what is the equation for gamma decay?

how can you use rounding to estimate 331+193

Determine the mass(in grams) of each of the following compounds. a) 0.709 mol magnesium fluoride i got 30.7grams but it was wrong. id appreciate the help! thanks! also if i end up getting the help i have a couple other questions

How many moles of O are in 13.5 mol Fe(NO3)3? i got 7.32e25 but soon realized that is totally wrong.

so i posted this question yesturday and got some help. which is the stuff below. can you look at the last thing i said which was the answer i got by doing what DrBob222 said to do and tell me if its correct.(the question is the first section) thanks chem...

A 4.91 g sample of aluminum completely reacts with oxygen to form 6.85 g of aluminum oxide. Use this data to calculate the mass percent composition of aluminum in aluminum oxide. i got 61.2% first and it was wrong. then i got 53.0% and it was wrong

Silver chloride, often used in silver plating, contains 75.27% Ag. Calculate the mass of silver chloride in grams required to make 4.7 g of silver plating.

suppose you had two samples of the same radioactive isotope. one sample had a mass of 25 grams. the other had a mass of 50 grams. would the same number of particles be ejected from each sample in the first hour? explain

A 2.241 g sample of nickel reacts with oxygen to form 2.852 g of the metal oxide. Calculate the empirical formula of the oxide. 1)NiO Give the number of moles of each element to support you answer. moles of Ni 2) 1.339 mol moles of O 3)1.34 mol I know #1...

Citric acid, the compound responsible for the sour taste of lemons, has the following elemental composition: C, 37.51%; H, 4.20%; O, 58.29%. Calculate the empirical formula of citric acid. (Type your answer using the format CO2 for CO2.) thanks

you measure the period of a 2.0m pendulum and find it is 2.8s. what is the value of g at your location?

What length pendulum will produce a period of 1.0s?

For english i need to write a paper of the the slang words used during the civil war. I already have many examples but i cant seem to find history or facts about it. am information that you know would be helpful like origin, history,who came up with the w...

i had posted this question about a week ago and had gotten help from bobpursley(thank you so much btw) but i was showed how to do it using an equationa and now when im studying for the test i realize i need to be able to make a conversion factor to solve...

Find the value of sec theta for angle theta in standard position if the point at (–2, –4) lies on its terminal side. If 0° lessthanorequalto x lessthanorequalto 360°, solve the equation sec x = –2. The terminal side of an angle theta in standard position...

is An antacid neutralizes stomach acid. a chemical reaction?

write a balanced equation for:Gaseous carbon dioxide and liquid water react to produce aqueous glucose (C6H12O6) and oxygen gas. I try but everytime i change the coefficient it makes the other elements unbalanced. the starting formula i got was: CO2(g) +...

Aluminum hydroxide and sulfuric acid neutralize to make water and aluminum sulfate. the first step i have done: Al(OH)3 + H2SO4 -> H2O + Al2(SO4)3 i find this one confusing XD

i am divisible by 8 and9.i am a three digit multiple of 10. i am between 200 and 700.

Balance the skeletal equation for the synthesis of urea. (Enter 0 for any empty boxes. Use the lowest possible coefficients.) _NH3 + _CO2 ¨ _CO(NH2)2 + _H2O in the _ goes a number

how do i know what the ions present are of this formula: Na3PO4 what are the anions and what are the cations? how do you know

I need major help im not understanding this at all: Complete and balance each of the following equations for acid-base reactions. (Type your answer using the format CO2 for CO2 and Al(OH)3 for Al(OH)3. Use the lowest possible coefficients.) HBr(aq) + LiOH...

more it it thani what does that mean??? also: EVELATOR and: DENTURES E F

balance the formula Cu(OH)2(s) + HNO3(aq) -> H2O(l) + fine the formula here(aq) i did the H20 but i don't know the other formula i thought it was CuNO3 but that's wrong and idk what to do with the extra O

balance the equation:(i can balance the equation but the problem i have is finding the formula for the last part HC2H3O2(aq) + Ca(OH)2(aq) -> H2O(l) + find the formula here the last part would be CaOC2H3O2? im a little confused. did the O fromt he H2O com...

I am having lots of trouble with these questions: Classify each of the following reactions in as many ways as possible. (Select all that apply.) a)2 Rb(s) + Br2(g) 2 RbBr(s) you can select: -acid-base -double-displacement -gas evolution -oxidation-reducti...

Classify each of the following reactions in as many ways as possible. (Select all that apply.) CuO + 2 HCl --> CuCl2 + H2O you can select: -acid-base(unsure because there is an acid but im not sure if theres a base) -double-displacement -gas evolutionx -o...

Ca(s) + 2 H2O(l) Ca(OH)2(aq) + H2(g) acid-base double-displacement gas evolution oxidation-reduction precipitation single-displacement synthesis whichs one(s) is it?? thanks

what is the definition of dauphin this huckleberry finn? I searched on the internet but there were so many i didn't know which one was used in the book

in the book huckleberry finn manys words are used that mean something like "to beat someone" for example to lick. i need to find 8 more of words that are used to mean "to beat" if you know any and the page number/chapter it is used in the book that would...

when looking at a chemical equation what are the evidences that a chemical reaction has occured. Or what is the evidence that it has not occured thanks:):) <3

2. Given the following equation, C2H5OH(l) + 3 O2(g)---> 2 CO2(g) + 3 H2O(l) How many liter of CO2 are expected in the combustion of 12.0 grams of ethanol? My work: 12.0g C2H5OH X 1 mol C2H5OH/46.08g C2H5OH X 2 mol CO2/1 molC2H5OH X 22.4L CO2/1 mol CO2 =...

Calculate the number of liters of hydrogen, measured at STP, that can be produced from the reaction of 0.155 mol of aluminum according to the following unbalanced chemical reaction equation. i got .193 L of H2 but it was wrong. i only have one submition l...

Some sulfuric acid is spilled on a lab bench. It can be neutralized by sprinkling sodium bicarbonate on it and then mopping up the resultant solution. The sodium bicarbonate reacts with sulfuric acid as follows. 2 NaHCO3(s) + H2SO4(aq) --> Na2SO4(aq) + 2...

Answers

The following answers were posted by visitors named hannah.

it is when a a susbstance changes through a permenant change, like endothermic or exothermic and creates at least one new substance. It can't be reversed.

he was hoping for whirled peas (world peace) (:

what texas indusrty, which included companies like texas instruments, grew rapidly in the 1950's?

it is just basic factorising but im not sure how u do it. x2-5x = by the way that is meant to be x squared, minus 5 x. also 3a2 - 6a =

i think mectrics are easy but SOMEBODY PLEASE HELP ME I HAVE TO DO THIS FOR SCIENCE!! I REALLY NEED TO KNOW THIS AND NOBODY KNOW EXCEPT MY SCIENCE TEACHER MR.JENKINS!!!!! OMGSH SOME1 PLZ!!!

7 grams is equal to how many kilograms

oh sry, didn't the whole question A gaseous mixture of O2 and N2 contains 32.8% nitrogen by mass. What is the partial pressure of oxygen in the mixture if the total pressure is 665mmHg ? would i start by calculating the number of moles of nitrogen? if so...

the width of a rectangle is 2cm.the perimeter of the recangle is 16cm. what is the length of the rectangle?

i have to do patterns. the pattern is 17_ 33_ _ 27 have no concept to follow

well cc is supposed tobe c with an exponite of two but i did not know how to write it and then it had d next to it but i don't know it said find the gcf of the set of monomials and that's how it was writen exept for the exponet

omg i need to figure out what this means for my exam!!! what does it mean? i don't get it

who was the first child born in the mayflower while crossing in the americas

plz help me? i need to know what acids there arein oven cleaners. help!

thanks is it K3PO4?

what kind of activity can you write about that's esy so you can explaun derections

i'm still confused please help me

Well I didn't understand it I have the following options: 6m 4m 3m (50+60)m

is the answer 11.8 m/s ?

why do eskimos wash their clothes in tide? Don't understand what the answer is

Thank you, Angel

I don't understand, can you give me an example when prime factorization is necessary and when it is not?

Oh okay so all you did was multiply 18 and 6 to get 108... but why did (y)get tied to 6?...Can you show me the steps on how to write the expression

okay thank you Ms. Sue

thank you Reiny:)

he has a very strong id and a weak super ego

i meant james im sorry.. but i solved the problem on my own thank u tho

10.817 (tenths, hundredths, thousandths, etc.)

Thank you Laren

and also. A car seat fades with extended exposure to sunlight. thats chemical not physical right?

you are right!<:

thank you so much!!

oh, would it be 24 (two sig figs) cause in the problem 43 has the least number of sig figs(2) or do we go by this equation: 343,000 = 43,000 x 4.184 x (Tf-22.1) = 0 and use 3 sig figs?

thanks. what about: block of aluminum with a volume of 98.2 cm3 absorbs 67.4 J of heat. If its initial temperature was 32.5 °C, what is its final temperature? (density of aluminum = 2.70 g/cm3) I know i have to change the volume to grams. but i don't know...

huh? what set up that u did? wait r u bobpursley?

estimated population

10m/s i believe and that is going up and down if you neglect air resistance

oops the numbers after the 1,2,3 etc. are suppose to be in the right column

the answer would be: -36s^2q. the s is squared and the q not because your multi. SQ*3S. so there are 2 S's but only one q.

the scientific notation would be: 8.17X 10^7 in scientific notations the decimal always has to be after the first non-zero number

2w-4/2w the only factor of 1 is 1. I dontknow how they want you to solve this with only factors of one. but you could divide both sides by 2. so you get w-2w

42/56 in simplest form

The molality of a solute is the number of moles of that solute divided by the weight of the solvent in kilograms

nevermind i got the answer but i do have another question: A salt crystal has a mass of 0.40 mg. How many NaCl formula units does it contain?

so do i have to convert .4 mg to grams first? that would be .0004 right? so then i just divide .004/58.44 and that will be my answer?

thanks so much!

a)a-there b)d- a pencil

so it would be .000006845 formula units?

first we want to get the like terms on the same side. so lets subtract 3 from both sides you get -4=4x then since we want x by itself we divide by 4 on both sides making the 4 cross out and we get -1=x

1. Cuzco 2. are there many? this is what i found. In 1528, Emperor Huayna Capac (Young Lord) ruled the Inca Empire 3.Mound Builders

substract 3 from the right side and left eg- -1=3+4x -3 -3 then divide by 4 on the right and left side. eg- -4/4=4x/4 x=-1

I used that answer and it was wrong. we have a practice version : the question was A salt crystal has a mass of 0.18 mg. How many NaCl formula units does it contain? and the answer was 1.9e+18 formula units. so wouldn't the answer for my question be in th...

the first 3 are def. correct. for the last one it seems like many could work. im not sure about that one either sorry but if i had to guess id think either a or b

i got the answer. thanks anyways!

shouldn't it be less than the 4.7 g of silver plating??

so the mass would be 6.24g?

oh i see! thanks

5^3= 5x5x5= 125 5^7=5x5x5x5x5x5x5= 78125

thats a little helpful but im kinda looking more for why the slang was used. was it easier for them?faster? and how did it all start up? did the soldiers just start using the words and everyone learned them? things like that

(a) 264 (b) 461.49 (c) 0

unless you just look to the next chapter of your text book if its something like math and you read that and try to understand it.

oh. sorry i didn't see my other post was answered thanks

so what i have so far is: 6-CO2(g) + 12- H2O(l) -> 1-C6H12O6(aq) + 6- O2(g) it said all the coefficients were correct except the 12 in front of the H20 how is that wrong?

I got most of it but there is one coefficient its counting wrong. i posted my problem on the previous post. would you like me to post it here also?

thanks! i didn't see the 2 after the H

nevermind i got it

well it has to end in 0 to be divisible by 10. I got:360 because 8 and 9 both go in evenly

can you explain more? i put the cation was Na3+ and the anion was PO4-. but it said it was wrong. what am i doing wrong?

I put Na+ as the cation and it counted it wrong. also. are you saying PO4- is the anion? cause i got it wrong. and what do the noble gases have to do with the ions. sorry im asking many questions

it says those answers are wrong

this is what it says: For the soluble compounds, write the ions present in solution. this is the soluble compound: Na3PO4 then it has 2 boxes one called cations and one called anions

I would say D also :)

thanks sooo much!!

use the a^2 + b^2 = c^2 c being the length of the hypotenuse

thanks so for this equation: HC2H3O2(aq) + Ca(OH)2(aq) -> H2O(l) + find the formula here the last part would be CaOC2H3O2? im a little confused. did the O fromt he H2O come from (OH)2?

48 is another one

The main teachers that are on this site that specialize in your subject just might not be on around this time. be patient and give it time and im sure someone will be able to help :)

oh i got it:) thanks:)

oh thanks sooo much:)

so is it just synthesis?

oh theres an arrown after Br2

oh sorry i miss read what you put. thanks

thanks. so would it be double displacement and acid-base?

thanks you so much. Also if i may ask im having trouble on another type of problem balancing this equation: C5H12O(l) + O2(g) --> H2O(g) + find the compound here I am able to balance it but i need to find the last compound i though it would be: C5H10O2 be...

its not also a precipitation os single-displacement??

or acid- base? because i did gas evolution oxidation-reduction precipitation single-displacement but got it wrong so I am thinking either one of those has to be taken out and/or acid-base added

could it also be an acid-base?

I got it:) it was just not a precipitate:) Thankyou sooooo much:)

also the word valley on page 174( at least in my book) its in the context that reads "the king said the cubby would do for his valley- meaning me"

can you find the music online? Why not just ask her for another copy when you get to school tomorrow and tell her what happened

im sorry your link/document doesnt work

sam..? im assuming just like the others we cannot see your documents so we don't know what the picture looks like. sorry

2Al(s) + 2NaOH(aq) + 2H2O(l) 2NaAlO2(aq) + 3H2(g) (unbalanced) sorry i forgot. it was unbalanced but then i balance it

thanks so its 5.21 L h2?

thanks for the help: can you help me with another one? Some sulfuric acid is spilled on a lab bench. It can be neutralized by sprinkling sodium bicarbonate on it and then mopping up the resultant solution. The sodium bicarbonate reacts with sulfuric acid...