christine

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

Questions

The following questions were asked by visitors named christine.

I'm going into AP (advanced placement) European History, grade 10, and our summer reading assignment was to read a A World Lit Only By Fire, a book about the tenaissance. Along with this assignment, I'm required to write a paragraph about the book'...

20 years ago

the circle graph at the right shows eye colors of the students in Mr.Chare's 4th hour class. If 7 students have either green or hazel eyes, how many students are there in the class? Circle graph is.. 12% gray 24%hazel 4% green 36% brown 24% blue I need he...

19 years ago

In 1995, more than 1.1 million students in the U.S. took the SAT. On the mathematics section, the mean =507, s=112 (standard deviation). Students receive scores rounded to the nearest 10. What is the interval of student scores that lie within one standard...

19 years ago

Estimate a population: To study a species of fox, a team captures and tags 25 foxes from a large forest and then releases them. The following week they capture 15 foxes and find 5 are tagged. Estimate the number of foxes in the forest. This is a proportio...

19 years ago

suppose the length of a rectangle increases,but the perimeter remains at 70 feet. How does the width change? Either the width increases, decreases or remains the same. Which of these three choices makes the most intuitive sense? We know perimeter = 2(leng...

19 years ago

What is the width of a rectangle with a perimeter of 70 feet if its length is 1 foot? 2 feet? L.feet? perimeter = 2(length + width) If perimeter = 70 then 35= length + width Now substitute 1,2,and L and solve for width. how do you find the L. feet? L is s...

19 years ago

give the demensions of rectangles with the perimeters of 70 feet and length-to-width ratios of 3 to 4, 4 to 5, and 1 to 1. Ok, the perimeter is 70 and perimeter = 2(length + width) The ratio is length:with=3:4 so length = (3/4)width 70 = 2(length + width)...

19 years ago

Hi, I have a math question that I need help with: g:-> 3(1.3)^x State equations for any asymptotes to the graph of g. I know what an asymptote is, but I do not understand this question...so lost. Help would be greatly appreciated. Thanks so much I'm a lit...

19 years ago

the number of sides in an argument There probably would be at least one side of an argument for each person participating. It would also depend on the number of available options to the situation being discussed. I hope this helps a little. Thanks for ask...

19 years ago

what can the congress do http://www.google.com/search?q=articles+confederation+congress&rls=com.microsoft:en-us:IE-SearchBox&ie=UTF-8&oe=UTF-8&sourceid=ie7 Lots of information here. =)

18 years ago

which exhibits hydrogen bonding (there can be more than 1) 1. IF7 2. SiH4 3. CH3CH2OH 4. (CH3)2CHOH 5. PCl3 6. CH3CHCHCH3 * do you have any tips for figuring it out? H bonding, by definition, takes place with H of one molecule and a highly electronegative...

18 years ago

what is the rhetorical device for: What is the difference between "sugar free" and "no sugar added"? sugar free means no sugar at all and non sugar added means it has natural sugar nd they don't add any extra bob do you know what the rhetorical device use...

18 years ago

Which of the following is the best definition of Hess' Law? A. Heat is always released by the decomposition of 1 mole of a compound into its constitute elements. B. Since enthalpy is a state function, it will be different if a reaction takes place in one...

18 years ago

An aspirin tablet weighing 0.475 g has been analyzed and contains 68.2 % ASA (180.16 g/mol) by mass. A student dissolved the tablet in hot NaOH and the cooled solution was diluted with DI water to the mark in a 250 mL volumetric flask. Exactly 3.00 mL of...

18 years ago

An unknown was prepared with the concentration of 0.000120 M. A Beer's Law plot was prepared using the absorbance values from standard solutions of ASA and a line drawn through all the points passed through the origin with a slope of 1750.0 M–1. The expec...

18 years ago

s- integral endpoints are 0 and pi/2 i need to find the integral of sin^2 (2x) dx. i know that the answer is pi/4, but im not sure how to get to it. i know: s sin^2(2x)dx= 1/2 [1-cos (4x)] dx, but then i'm confused. The indefinite integral of (1/2) [1-cos...

18 years ago

i'm having trouble evaluating the integral at pi/2 and 0. i know: s (at pi/2 and 0) sin^2 (2x)dx= s 1/2[1-cos(2x)]dx= s 1/2(x-sin(4x))dx= (x/2)- 1/8[sin (4x)] i don't understand how you get pi/4 You made a few mistakes, check again. But you don't need to...

18 years ago

if a structural isomer has an OH attached, i don't understand why it's unlikely that it'll be a liquid at room temperature. I think, I'm not sure, but because both O and H are gases I can think of many alcohols that are liquid at room temperature.

18 years ago

s- integral s 1/ [ (x^4) sq.rt(x^2+9)] i know x=3tanx sq.rt(x^2+9)= 3 secx dx= 3/[cos^2(x)] so far i know: = 1/ (3tan^4(x)) 3secx cos^2(x)) dx =1/ 81 [ (sin^4 (x)/cos^4 (x)) (1/cosx) (cos^2(x))] then i'm not really sure what to do next

18 years ago

I wrote a story for my Spanish class; could someone please proof-read part of it for me? Thanks! Ella se cae, arrodillada sobre la orilla. Es donde ellos tuvieron sus primero encuentra. Llorando, ella se depila los pétalos de una flor. Ella gota los pétal...

18 years ago

A solution is made by mixing 20.0 mL of C6H5CH3, d=.867g/mL, with 140.0mL of C6H6, d=.874g/mL. assuming that the volumes add upon mixing, what is the molarity? what is the molality? i know that molarity= moles/L and molality= moles sol/kg solvent... but i...

18 years ago

A student performed the freezing point depression experiment according to directions but mistakenly recorded the mass of lauric acid as 8.300g instead of8.003g. The calculated molar mass of the unknown acid will be GREATER/LESS than true value b/c mass of...

18 years ago

when Br2 (5.7mol) and Cl2 (.0934mol/L)in a 61 L vessel at 604'C are allowed to come to equlibrium the mixture contains .0523 mol/L of BrCl. What concentration of Cl2 is reacted? - i know how to find the Kc... Br2 + Cl2 ==> 2BrCl 0.0523 mol/L BrCl at equil...

18 years ago

when CO2 (.15mol) and H2 (.302g) in a 500L vessel at 576'C are allowed to come to equilibrium the mixture contains .000183 mol/L of H20. what is the equilibrium concentration of CO? CO2 + H2 --> <-- CO +H2O The equilibrium concentration of H2O = the equil...

18 years ago

what's Kp if Cl2CO was found to be 7.46% decomposed at 395'C when initial pressure is 7.60atm. Cl2CO --> <-- CO + Cl2 Initial p = 7.60 atm. 7.46% decomposed. (CO) = 7.60*0.0746 = ?? (Cl2) = same ((Cl2CO) = 7.60*(0.9254) = ?? Kp = pCO*pCl2/pCl2CO Post your...

18 years ago

? MnO4– + ?H+ + ?C2O42– --> ?Mn2+ + ?H2O + ?CO2 what's the balanced equation? correct coefficients? is it 1MnO4- + 2H+ + 1C2O42- --> 1Mn2+ + 1H20 + 2CO2 ? c2042..? are you missing parenthesis somewhere? oh i see, no i believe this is correct: MnO4- + 8h+...

18 years ago

im trying to calculate the pH of a 1.0L soln containing 53.8 g of completely dissociated Mg(CN)2. is this the diss. equation? Mg(CN)2 + water --> MgOH + 2CN^- i don't think i did the problem rite b/c i got 15.7 for the pH. i got 53.8M Mg(CN)2 for the init...

18 years ago

how many grams of sulfur are needed to react w/ 246 grams of mercury to form HgS? Hg + S ==> HgS unless your instructor insists on writing S as S8, in which case it will be 8Hg + S8 ==> 8HgS. The answer will be the same no matter whi...

18 years ago

what is the mass of F in grams in 24.6 grams of SnF2? Convert 24.6 g SnF2 to mols SnF2. Convert mols SnF2 to mols F atoms. Convert mols F atoms to grams F atoms. 24.6 g SnF2*(1 mol SnF2/molar mass SnF2)*(2 mols F/1 mol SnF2)*(atomic mass F/1 mol F Atoms)...

18 years ago

a 46.2 mL, .568 M calcium nitrate soln is mixed w/ 80.5 mL of 1.396 M calcium nitrate soln. whats the concentration of final soln? mols 1 + mols 2 = total mols mols/volume in L = M OH! thanks! i got the right answer, 1.09 M.

18 years ago

the early bstone age people had to learn to adapt to their what?

18 years ago

this deals with TLC chromatography: if 2 compounds have same Rf under identical conditions, does it show that they have identical structures? i think it does. but im not sure why. thanks mucho.

17 years ago

im given the refractive index values of two - isobutyl bromide (1.3785) and isobutyl chloride (2.4368). the solution's refractive index is 1.3931. determine the molar composition (%). im not sure how to get the concentrations of Br and Cl. i have this so...

Ok this is probably a stupid question but a hospital pharmacist works at a hospital right?

17 years ago

In the preparation of sulfuric acid, sulfur dioxide must be catalytically oxidized to sulfur trioxide. How much oxygen must be available to convert 50.0 L of sulfur dioxide according to this process?

17 years ago

How much heat is needed to melt 50.0g of ice at 0 degree celcius and then heat the water to 25 degree celcius?

16 years ago

What was the debate between North and South over counting slave populations?

16 years ago

Did the Constitution resolve the weaknesses in the Articles of Confederation?

16 years ago

unit rate of 250 miles in 4hrs

16 years ago

who solves the disputes over issues in congress? the correspondence committe, the committee of conference, or the core committee.

16 years ago

the trying of impeachments is done by who?

16 years ago

in a political party, what is the job of precinct captain?

16 years ago

AIDS/HIV funding and Research

16 years ago

please help emergency. find double integral of x times y time e to the <x plus y> . bounded from <0,1> x <0,1>

16 years ago

A 70.0 kg climber is supported in the "chimney" by the friction forces exerted on his shoes and back. The static coefficients of friction between his shoes and the wall, and between his back and the wall, are 0.760 and 0.610, respectively. What is the min...

15 years ago

need help with edhelperku puzzle

15 years ago

Distributive, Associative, or neither? 3(bz)=(3b)z

15 years ago

Electrical system are governed by Ohm's law, which states that V = IR, where V=voltate, I=current, and R=resistance. If the current in an electrical system is decreasing at a rate of 9 A/s while the voltage remains constant at 14 V, at what rate is the re...

15 years ago

a) Describe the niche of the sea lamprey. b) Find out how sea lampreys may have entered the Great Lakes ecosystem. c) Identify the interspecific interactions of the sea lamprey and its effects on the Great Lakes.

15 years ago

explain the difference between gymnosperms and angiosperms give give 5 examples of each that are ontario native

15 years ago

give 2 examples each of situations in which you might use the following pesticides Insecticides and fungicides

15 years ago

Would distilled water conduct electricity? Why or why not?

15 years ago

What is the difference between inference and observation?

15 years ago

The percentage composition of chlorine, by mass, in the compound K2PtCl4 is

15 years ago

If the percentage yield of a reaction was 78.51% and the theoretical yield was 288.0 g, what was the actual yield?

15 years ago

List three ways in which human activities have contributed to the production of gases that dissolve in water to form acid precipitation

15 years ago

Explain what will happen to the volume of a gas as the pressure on that gas is increased. Assume that the temperature and amount of gas remain constant.

15 years ago

Explain why the type of metal used in creating fireworks determines the colour seen when the fireworks are set off. Discuss what occurs within the metal atoms.

15 years ago

How could hard water decrease the efficiency of your kettle?

15 years ago

For each of the following listed below, explain how it enhances the plants ability to survive and reproduce in a terrestrial environment. B) Pollen C) Waxy cuticle

15 years ago

To stop an elevator in free fall, brakes are installed between the walls of the elevator car and the walls of the shaft in which the car moves. In addition, springs with compression coils are installed on the floor, at the bottom of the shaft, in order to...

15 years ago

A total of 1200 students attend top view high school. The ratio of teachers to students is 1:30. How many teachers are there at the school?

15 years ago

what is the difference between a basic bunsen burner and the tirrll burner

15 years ago

it is considered a saftey hazard to leave an operating burner unatteneded unless the flame is made luminous10 explain why

15 years ago

when an object was weightedon a top loading balance the balance display read 13.730 the mass was recorded as 13.73g what is wrong with that explain the answer

15 years ago

where would the safest location on the bench to set up and use a labratory burner explain why

15 years ago

when is it appropriate to use gravity filtration and when to use vaccume filtration

15 years ago

a nugget of gold with a mass of 437g is added to 50ml of water the water raised to a volume of 90.0 ml what is the density of the gold

15 years ago

consider a neutral atom with 69 protons and 80 neutrons what is the atomic number of this element

15 years ago

a dose of asprin of 5.0mg per kilogram of body weight has been perscribed to reduce the fever of an infant weighing 8.0 pounds one pound is 453.59g what is the number of milligrams of asprin that should be administered

15 years ago

A refinery receives 4.23434x10^4 m3/h of crude oil. After the distillation process roughly 4.76216x10^1 % of the crude is converted to miltitary aviation fuel (JP4). What is the amount of JP4 produced in a day in L, expressed to 4 significant figures?

15 years ago

A mining operation excavates 5.482x10^4 metric tonnes of ore each hour. In an 12 hour production shift, how much ore is excavated in kg, to 2 significant figures?

15 years ago

A descending elevator of mass 670 kg is uniformly decelerated to rest over a distance of6 m by a cable in which the tension is 8683 N.The acceleration due to gravity is 9.8 m/s2.Calculate the speed vi of the elevator at the beginning of the 6 m descent. A...

15 years ago

A block of mass 39 kg lies on an inclined plane, as shown. The horizontal and vertical supports for the plane have lengths of 36 m and 15 m, respectively, and the coefficient of kinetic friction between the plane and the block is 0.3. The magnitude of the...

15 years ago

A plane travels with a uniform velocity of 3.399x10^1 m/s for a period of 2.267x10^0 seconds. What distance is travelled during this time, in meters

15 years ago

space shuttle travels at about 7.4581x10^3 m/s. An astronaut takes about 1.5933x10^2 ms to blink an eye. How far does the space shuttle travel in that time, expressed to 4 significant figures?

15 years ago

What volume (in Liters) of hydrogen must react to form 17.0L of ammonia according to the following balanced equation: N2(g) + 3H2(g) --> 2NH3(g) Assume an excess of N2 and that all are at the same temperature and pressure.

14 years ago

What volume (in Liters) of oxygen must react to form 17.0L of carbon dioxide according to the following balanced equation: 2CO(g) + O2(g) --> 2CO2(g) 17.0 L CO2 x (1 moles O2/2 moles CO2) = 17.0 x (1/2) = 8.5 L did i do this problem correctly

14 years ago

a kid goes down a slide, accelerating at 1 m/s^2 for 3 seconds. if he starts at rest, how long is the slide ? this is the equation i have but i need Xi which i have NO clue what it is .. Xf= Xi+ 0m/s(3s)+1/2 (1m/s^2)(3^2s) solving for Xf ... need Xi

14 years ago

Metal Specific Heat (J/g-C) Al (s) 0.900 Au(s) 0.129 Cu(s) 0.385 Fe(s) 0.444 Hg(l) 0.139 H2O(l) 4.184 C2H5OH(l) 2.46 A piece of metal at a temp of 95.0oC and a mass of 67.0 g is dropped into a beaker of water containing 100 g at a temp. of 30.0oC. If the...

14 years ago

I really really need help w/this problem I think i figured it out but i have to be sure i did it right in order to do others similar to it please help thanks Metal Specific Heat (J/g-C) Al (s) 0.900 Au(s) 0.129 Cu(s) 0.385 Fe(s) 0.444 Hg(l) 0.139 H2O(l) 4...

14 years ago

really really need help w/this problem I think i figured it out but i have to be sure i did it right in order to do others similar to it please help thanks Metal Specific Heat (J/g-C) Al (s) 0.900 Au(s) 0.129 Cu(s) 0.385 Fe(s) 0.444 Hg(l) 0.139 H2O(l) 4.1...

14 years ago

How do you work this one problem? Metal Specific Heat (J/g-C) Al (s) 0.900 Au(s) 0.129 Cu(s) 0.385 Fe(s) 0.444 Hg(l) 0.139 H2O(l) 4.184 C2H5OH(l) 2.46 Using the above table, determine the final temperature if 713.6J is released from a 48.2g sample of copp...

14 years ago

What would happen if 50 grams of carbon fully reacted to oxygen?

14 years ago

a 6.54 g sample consisting of a mixture of silver nitrate and sodium nitrate is dissolved in water. this mixture then reacts with barium chloride to for 3.50 g of silver chloride. calculate the percent by mass of silver nitrate in the first mixture

14 years ago

When an electric discharge is passed through boron trichloride a new compound is formed. what is its simplest formula if on analysis it is shown to contain .0878 g of chlorine and .0131 g of boron?

14 years ago

how long will it take to decompose 38% of A at 25 degrees celsius?

14 years ago

I have a perimeter of 15. I am not a square . Each of my sides is 3 units long. What shape am i?

14 years ago

is the answer to find an equation of the curve that passes through the point (1,1) and whose slope at (x,y) is y^2/x^3 is y=2x^2-1

14 years ago

if dy/dt=-3y and if y=1 when t=0, what is the value of t for which y=1/3?

14 years ago

Answers

The following answers were posted by visitors named christine.

yes

18 years ago

Should we eliminate fats from our diets altogether and increase proteins? 2. What are some of the benefits that unsaturated fats provide when included in a balanced diet.

17 years ago

orange juice is a good example!! Because the state of a subthat is mixed but never really be dissovled. We learend about this in science class.

16 years ago

I'm very confused with this question and check point

15 years ago

I'm very confused with this question and check point•According to current (within the past two years) research and news reports, what are some of the changes the United States has made to policies concerning the treatment of Muslim and Arabic members of s...

15 years ago

revois m'attendra irons emmenerons passerons

15 years ago

I'm not sure I understand what youre asking here because I don't see any underlined words?

15 years ago

Three distinct layers of different tissue cells form the walls of blood vessels. The outer most layer is connective tissue. The middle layer is smooth muscle. The inner wall is primarily composed of endothelial cells.

15 years ago

for the first question, there is 1g of water per 1 cm cube therefore there is 1000 kg of water per 1 m cube that is your answer for the 2nd one, im not sure

15 years ago

A dose of asprin of 5.0mg per kilogram of body weight has been perscribed to reduce the fever of an infant weighing 8.0 pounds. One pound is 453.59g. What is the number of milligrams of asprin that should be administered

15 years ago

ok so 8.0x10^4 = 80000 tons 80000 = 176 369 809.75 pound =80 000 000 001 grams m = vxd = 80000x1.03g/mg

15 years ago

i got the correct answer but i still get any of the concept >.< i feel dumb ahhh oh oh any good sites to learn physics really good

15 years ago

how do you do this problem?!

14 years ago

9 m/s2

14 years ago

Find the current value per share of Suarez Manufacturing’s common stock.

13 years ago

6.022 x 1023 atoms. Thank you Dr Bob222

13 years ago

What effect will the current governmental initiatives that focus on expanding health care coverage to more Americans have on health care costs and health care services in the United States? What would you add or subtract from the recently approved healthc...

13 years ago

thank you and then 100/4= 25 is that correct

On a table there is a bowl of chocolates. All but four are yellow. All but four are blue. All but four are purple. How many chocolates are in the bowl?

12 years ago

determine whether the graphs will be parallel,perpendicular, or neither...... y=2/3x-6 2x-4=3y

12 years ago

I don't understand what Profit Margin is. How is the answer to 13 B? When the information provided, that the answer should be D.

12 years ago

suppose the projector is moved to a point 9 ft from the screen. what size will the picture be (width, height, and area) please help

11 years ago

72 x 5/6 =60

11 years ago

4x+2(250-x)=740 4x+500-2x=740 4x-2x=740-500 2x=240 x=120

10 years ago

Do you mind if I send you a copy of the essay? I have already read it aloud and tried to cut down on wordiness, but the words I use are carefully chosen and have a purpose, so I don't want to lose the purpose of the essay either. I'm not sure where I am g...

10 years ago

0.08x+2.1=

10 years ago

I can solve it now. Sorry about the post.

10 years ago

Hi Do you edit papers at all?

10 years ago

as in whole papers

10 years ago

Hi can someone please delete one of my questions?

10 years ago

i am helping my forth grader with homeword, how do i know which letter to look at when looking at the vowel,consonsnt, consonant, vowel

10 years ago

what is its velocity when it returned to the elevation from where it was thrown?

9 years ago

please, help I don't know how to go about it

9 years ago

c is correct it is 6:4

9 years ago

Translate this phrase into an algebraic expression. Five more than the product of 19 and Mabel's height Use the variable m to represent Mabel's height.

8 years ago

a= 5, d=7

7 years ago

I don't know these answers they are hard!

6 years ago

punishing wrongdoers

6 years ago

Write the number 2.4 in the form , using integers, to show that it is a rational number

5 years ago

10[4*10/{6-4}+1

5 years ago

What equation models the data in the table if d = number of days and c = cost? Days Cost 2 16 3 24 5 40 6 48

5 years ago

What equation models the data in the table if d = number of days and c = cost?

5 years ago

Ahmed un portable

4 years ago