Chopsticks

Most popular questions and responses by Chopsticks
1. Chemistry

A sample of Oxygen has occupies 1.00x10^6mL at 575mm Hg is subjected to a pressure of 1.25atm. What will the final volume of the sample be if the temperature is held constant v2=(p1)(p2)/p2 I'll have to convert 1.25atm to mm first 1.25atm*760mm/1.0atm =

2. Chem Check

Can someone verify my answers please? convert the folowing into a pressure reading expressed in torr A. 1.25atm * 760torr/1.0atm = 950. torr B. 2.48 x 10^-3 atm * 760torr/1.0atm = 1.88 torr C. 4.75 x 10^4 atm* 760torr/1.0atm = 3.61 x 10^7 torr D. 7.60 x

3. Chemistry

What is the limiting reactant when 19.9g of CuO are exposed to 2.02g of H2 according to the following equation? CuO + H2 ---> Cu + H20 My attempt at this: 19.9gCuO * 1moleCuO/79.539gCuO * 1moleCu/1moleCuO = .250moleCu 2.02gH2 * 1moleH2/2.016gH2 *

4. Chem

How much water must be added to 500.mL of .200M HCL to produce a .150M solution? (.500mL x .200M)/.150M = .667mL Correct? A chemistry student needs 125mL f .150M NaOH solution for her experiment, but the only solution avail. is 3.00M. Describe how the

5. dilution

Many labs keep bottles of 3.0M solutions of the common acid on hand. Given the following molarities of the concentrated acids, determine how many mL of each concentrated acid would be required to prepare 225mL of a 3.00M solution of the acid Acid: HCl

6. Chemistry

At standard temperature, a gas has a volume of 275mL. The temperature is then increased to 130. Celcius, and the pressure is held constant. What is the new volume? How do I work this? v1 = 275mL t1 = 130. C or 403K v2=??? t2 = ??? Can someone help me

7. chemistry

Nitric Acid + Calcium hydroxide ---> calcium nitrate + water I wrote it as : NO3 + Ca(OH)2 ---> Ca(NO3)2 + H20 Did I write it correctly? Where should I put my charges? I also have big time trouble balancing this one.

8. Chemistry

Three of the primary components of air are carbon dioxide, nitrogen, and oxygen. In a sample containing a mixutre of only these gases at exactly one atmosphere pressure, the partial pressure of carbon dixoide and nitrogen are given as Pco2 = 0.285torr and

9. Ms. Sue - ACT Test

I was wondering if you had any experiences with the english part of the ACT test. About 3 hours ago, I took a pratice test on the english part of it, and got like 20/35. That's like 57% right. I want to know how to tackle those sections where they have a

10. Chemistry+Balancing Equation

Solid phosphorus trichloride is produced by reacting solid phosphorus and chlorine gas. 2P + 3Cl2 -----> 2PCl3 is that right?

11. chem

is iron (III) carbonate a solid or (aq)?

12. Chemistry

Determine the simplest formula for compounds that have the following analyses. The data may not be exact. A. 28.5% iron, 48.6% O, 22.9% S This is what I did: 28.5g Fe 1 mole Fe/55.847g = .51 mole 48.6g O 1 mole O/15.999g = 3.04 mole 22.9g S 1 mole

13. Math+Log

Simplify the expression: The first 7 is regular size and the log7x are small (the second 7 is subscripted only). 7log7x = would the answer be 1? How do you work this?

14. Chemistry

Use the experimental molar mass to determine the molecular formula for compounds having the following analyses. A. 41.39% carbon, 3.47% hydrogen, 55.14% Oxygen; experimental molar mass 116.07 I got C4H4O4 as the molecular formula. Can someone check this

15. Chemistry+Percentage

Calculate the percentage of water in each of the following hydrates. Aluminum bromide hexahydrate I just need help setting this up. I can work it from there Would it be: AlBr * 6H2O Did I write it right?

16. previous chemistry.

can some one reply to my last chemistry post? thanks.

17. Chemistry+need help checking work

Using aervage atmoic masses for each of the following elements, calculate the mass, in amu (grams) A. 635 atoms of hydrogen ---> 1 mole of H = 1.01g = 6.022 x 10^23 atom 635 atom of H 1.01g/6.022 x 10^23 atom I got 1.06 x 10^-21 amu. I got that answer

18. Chemistry+Empirical formula

This is kind of tricky for me. What os the empirical formula (lowest whole number ratio) of the compounds below? A. 25.3% Cu, 12.9% S, 25.7% O, 36.1% water How would i set this up? The water at the end is confusing me. I think I need to find the percentage

19. HORRIBLE!

Hello, I took my ACT test today, and I think I epicly failed the english part. The part where you had to correct the underlined sentence was really hard. I would narrow it down to 2 answers, but obviously only one can work. Both of them looked correct to

20. Chemistry again

Chromium is ametal that is added to steel to improve its resitance to corrosion. Calculate both the number of miles in a sample of Cr containing 5.00 x 10^20 atms and the mass of the sample. Ok this is how I worked it. 1 mole of Cr = 51.996g = 6.022 x

21. Boiling point (DrBob)

If you add 2g of NaCl to 23mL of water, what is the boiling point? . 2 g/molar mass Salt = 58.4425 mole of salt delta T = Kb*m delta T = 0.512 x 0.23 = 0.113 or about 113 C. I tried to model this problem like you did, but I don't know if I did it

22. The Great Depression

I'm doing a report on the great depression and I need some reliable source about politcal issues or anything politcal that occurred during the great depression. My teacher made us use note cards to write these information down. Any help would be greatly

23. Chemistry

A silicon chip is used in an integrated circuit of a microcomputer has a mass of 5.68 mg. How many Si Atoms are present in this chip. Okay here is how I worked it. Can someone please tell me if its right? 1 mole of Si = 28.086g = 6.022 x 10^23 5.68mg of Si

24. Sra

Are you going to be on for a lil bit more? Around 1-2 hours now from this post? I really need help with some french, but I have to do some other homework first. I'll check on your reply in a bit. Merci beacoupe.

25. Resume

I have no idea what to put under my experience section of my resume? Should I just exclude it from the resume? I have no working experience :P

26. EW! GRAMMAR!

Can someone help me find GOOD pratice tests for Prepositional phrases, Participial phrases, gerunds phrases, infinitive, appositive, adjective phrase, adverb phrases, main clause, subordinate clause, complex clause and compound complex clause Thanks!

Does anyone here speed read? I can do a little bit, but I can comprehend what I read too well when I try to speed read. All I can do is read the words then forget everything. Any tips? Or is that the negative thing about speed reading?

28. science

India : Duck Australia : Duck South Africa : Duck, Goose Africa : Duck Cat Antarctica: Duck Goose If scientist wanted to argue that South Africa, Africa, and Antarctica was once connected, which animals would they use to determine that? Would it be just

29. Chemistry

2C2H2 + 5O2 --> 4CO2 + 2H20 How many grams of CO2 is produced when 2.50 x 10^4gC2H2 burns completely 2.50 x 10^4gC2H2 * 44.009gCO2/26.038gC2H2 = 4.23x10^4gCO2? or am i wrong

30. log

How do you solve 6log2x = 13 I got log2x^5 = 13 but I don't know what to do next. Would it be 2x^5 = 13^2 HELP. Thanks.

31. alg 2

Can someone tell me how to factor 2a^2b - 16ab + 32b Should I factor 2b out of it?

32. Chem

Why does H2O + Sugar have a higher boiling point than Water? I said that H20 + Sugar has a solute of sugar which absorbs some of the heat when boiled. Is that correct?

33. Chemistry

Sometimes, instead of percentages compostion, you will have the composition of a sample by mass. Using the actual mass of the sample, determine the empirical formula for compounds that have the following analyses. A. a .858g sample of an unkown substance

34. song

I am not a music person and I rarely lisen to music. My teacher made us do an essay to modern music that has the theme of freedom or going to a better place. Does anyone know a song that has both freedom and going to a better place? or asking for help? can

35. Chemistry

Aluminum bromide hexahydrate How would you know its AlBr3 * 6H2O instead of just AlBr * 6H2O?

36. Rational Zero Theorem

I know how to solve if the leading coefficient is 1, but how would i solve it if its not 1. Ex. f(x) = 2x^3 + 7x^2 - 7x + 30 Can someone help me start that out? Then I'll use synthetic divison to solve for it.

37. math

A theater group made appearances in two cities. The hotel charges before tax in the second city were 1500 lower than in the first. The tax on the hotel bill was 5.5% in the first city and 10% in the second. After the trip, the total tax paid on

38. Math

Give an ordered pair (a,b) of numbers that satisfy the equation. I got (1,1) but cant i also be (2,4)? I'm not sure how to answer that Also, Write each equation for the vertical and horizontal lines passing through the point (7,-5) in (x,y) - coordinates I

39. Science help

India : Duck Australia : Duck South Africa : Duck, Goose Africa : Duck Cat Antarctica: Duck Goose cat If scientist wanted to argue that South Africa, Africa, and Antarctica was once connected, which animals would they use to determine that? Would it be

40. DrBob22

We have never learned the formula (P1V1/T1) = (P2V2/T2) Is that the same thing as P1V1T2=P2V2T1 ??

41. FDR+OBama

Do you see any similarities between FDR and Obama as leaders? What about similarities between the economic challenges faced then and now? Compare and contrast the two presidents and their responses to economic issues during their administrations. Well, I

42. Reiny+Damon

Can you reply to my last math+log post =) thanks. I'm going to be having alot of math questions today.

43. DrBob

Can you reply to my last post? thank you.

44. Chemistry

Hydrogen sulfide burns in the presense of oxygen producing sulfiar dioxide and water I got HS + O2 >>> SO2 + H2O Its not balanced yet, but can you check if i wrote the equation right? Does the hydrogen sulfide need charges added to them?

45. Chemistry+Balancing equations

Aqueous magnesium hydroxide has been used for many uears because it reacts with HCL to produce magnesium chloride So far I got Mg(pos. 2 charge)OH2(-1 charge) + HCL >>>>>>> Mg(+2 charge)Cl2(-1 charge) + H2O did i get that rite?

46. Chemistry

When burning a Magnesium Ribbon, would the color (the white dust) that it changed to be a chemical change? Or how about the spark it makes (I am just in basic chemistry, so that spark might be counted as a chemical change)? So far I got from the help for

47. Chemistry+empirical formula

What is the empirical forumla (lowest whole ratio) of the compounds below? A. 13.0g Mg 1 mole/24.312 = .53 mole 87.0g Br 1 mole/79.909g = 1.09 mole Mg .53/.53 Br 1.09/.53 Mg 1.0 Br 2.1 What do i do now?

Hello, my research paper is due Friday, and I am done with it. I need someone to proof read it and I was wondering anyone is willing to proof read 6-7 pages of text. I know that's alot to ask for, but I need a good grade on this. Is there anyone available

49. not really school related.

Okay, I got accepeted for a part time job at school, and the letter says that I should bring a resume. I never had a job before, so how would I bring a resume, but it seems really bad for me not to bring something.

50. Rationing

Compare the rationing in WWII to how we have been affected by the wars in Afghanistan and Iraq. How would Americans today react to a government rationing program? Choose 3 of the items you read about that were rationed during WWII and explain whether or

51. Exp. Growth + Decay (HELP ME PLEASE!)

1. Suppose you invest \$1,000 in a CD that is compounded continuosly at the rate of 5% annually. What is the value of this investment after one year? two years? five years? A=1000(e^(.5x1)) = 1648.72 A=1000(e^(.5x2)) = 2718.28 A=1000(e^(.5x5)) = 12182.49 2.

52. Math+graphing Log

how would i graph log3x the 3 is subscripted? I remember that I had to make an X and Y chart and list the Domain and Range

53. history ish

The U.S is the only country currently not using the metric system as its primary system of measurement. Imagine uou have been appointed to the Board in the US Trade and Commerce department that is trying to rewrite the metric conversion act of 1975 in

can someone reply to my last chem post

55. Chemistry

I was doing a lab today in chemistry, and I do not know if I got my measurements correctly. My teacher gave us a strip (probably 5inches) of Mg. We measured it, and then after that, we had to burn it, and measure the mass of it after it was burn. Would the

56. Math

Ok heres another factoring that I need someone to check Problem: -x^3 + 27 -(x^3 - 3^3) So I moved the positive and found out what cubed would make 27 Using the forumla: (a-b)(a^2+ab+b^2) -(x-3) (x^2 + 3x + 9) Right? Or did I make a mistake?

57. Alg 2

Can someone tell me how to factor 2a^2 - 16ab + 32b I just need someone to help me get started, and I want to see if I can finish it.

58. Math

The Sugar Sweet Company is going to transport its sugar to market. It will cost 4375 to rent trucks, and it will cost an additional 175 for each ton of sugar transported. Let c represent the total cost (in dollars), and let s represent the amount of sugar

59. English+Grammar

Is this sentence correct? This sentence makes no sense at all. I ate a grape and went to the mall. or would it be I ate a grape, and went to the mall. Or is it both?

60. Virus

Can a virus attach to your cells and steal nutrients from it? Answer: Yes. Can a virus attach to your cell and burst it by filling it up with water? Answer: No Correct?

61. Science

Say that an airplane is traveling at 800mph. A woman walks from the back of that plane to the front at 3mph. How fast is that woman actually walking? Is she still walking 3mph? or 800+3= 803mph? I keep wanting to say its 3mph

62. Dr.Bob22

Can you please verify the anwer I gave robb under his chemistry post called "mass-mass". I probably did something wrong.

63. Final thought+Suggestion

Okay, I recently made a post about converting the homework help section into a homework help forum. I have heard that many tutors have suggested this but there were some problems that occurred. What do you guys think? I want to here opinions from all the

64. Stainless Steel

How sharp is stainless steel? Can someone give me a comparsion to how sharp stain steel is? are they as sharped as kitchen knives? or how about samurai swords?

65. Math+Growth/Decay

3e^2x = G -3e^2x = G -3e^-2x = D 1/8e^2x = G -1/8e^-2x = D Would that be correct? I just made these examples up in my head. How can you tell if its growth or decay? I just look at the exponents. If is a negative then its decay? if its positive then its

66. Math Course

I was thinking about math courses for next year, and I do not know what I'm going to take. What is the differences between Alg 3 and Advanced math? And also, and does Trig involve? And I'm too scared of calculus to take it.

67. Confused.

Okay, I'm going to register for the ACT, on their website it says Registration Deadline: February 27, 2009 Does that mean starting tomorrow, I'll be late? Or tommorrow will be the last day to register?

68. Chemistry+balancing equation tips

We are on combustion reaction at the moment in chemistry, and I have to say, these reactions are like extremely hard to balance(well, just alot of erasing). It takes me a while to balance combustion reactions and I want to know if theres any tips in

69. Chemistry

Can someone tell me when I add charges to my balancing equations? I know that you add charges when dealing ionic compounds (metal and nonmental), but what else? Acid?

70. Chemistry

WAter amd nitrous oside are produced by heating ammonium nitrate NH4NO3 >>>> NO + H2O is that right?

71. accounting

Anzlyzing financial statement effects of accounting for bad debits using the allownace method. Duffy Bros. uses the allowance method to account for bad debets expense. Duffy experienced the following four events in 2008: 1.Recognition of 64,000 of service

72. DrBob+Thanks!

Drbob, your explanation is very clear and I learned alot out of it. I also have one last question to ask you. I posted it at my last post.

73. Last chemistry post

Can someone please reply to my previous post about chemistry preferable DrBob since he was helping me on it, but anyone is fine.

74. Chemistry Conversions

Convert to Mass Convert to Mass: .000523 moles of C6H12O6 if figure that out, would i have to add up the molar mass of C x 6, H x 12 and O x 6 ? then us the total mass of that over moles to find out?

75. English+D.O and I.O

Can someone teach me how to locate direct objects and indirect objects in a sentence?

2/the 6th root of 81 the answer gave an answer of "2 3rd root of 3/3" sorry i didn't type the root signs, i dunno how. can you show me how to work this?

77. Alg III AGAIN :)

This one is hard. 5 - |3-2x|/3 = 4 How do I begin to do this? -|3-2x|/3 = -1 -|9-6x| = -3 or -|9-6x} = 3 ????

78. Delta T

In the delta T formula how do you find i = ? If its ionic like NaCl then i = 2 What if its like C6H12O6? i = 1 ? or i = 3? Since that is not ionic i would assume it will be 1

79. Robert Frost

What did Robert Frost write about in his poetry? I think he wrote about the common people of America.

80. French

How do you say You must put on your seatbelt? ans: Vous faut mettre sur votre ceinture de securite You must use your signal to turn ans: vous faut utiliser votre clignotant avant de tourner You must not use your phone while driving ans: Vous ne faut pas

81. Sleeping.

Is sleeping a waste of time? Now that I think about it, sleeping seems like a waste of time.

82. Logging in.

What is the purpose of the login function on this website? You can always change your name to whatever you want, so why even have it there?

83. Chemistry Lab+Help

Okay, basically what we did in the lab was fill up an empty soda can with about 5mL of water, and we had to heat it up to a boiling point. After that we turned the soda can upside down into a beaker with cold water. After a minute or so, the can just

84. Log

Expand Log5(5squareroot x/7) the first 5 is a base how would you expand that?

For each product of the following unbalanced equations which reactant is limiting, and calculate the mass of each product that is expected. 1) 2Al + 6HCL --> 2AlCl2 + 3H2 15.0gAl * 1moleAl/26.981gAl * 2moleAlCl3/2moleAl * 133.34gAlCl3/1moleAlCl3=

86. DrBob

Can you reply to my last post on chemistry? thanks alot.

87. Reiny

Can you check back at my last post again? Thanks.

88. Reiny+ In need of help

Hey Reiny, could you please take a look at my expo growth and decay post? Thanks alot.

89. Ms. Sue

Can you reply to my french post. I think your able to help me with it.

90. FRENCH 2-TEST!

AHH! I just remember about my french test tomorrow on qui and que. How do you know when to use which? HELP!

91. Mahatma Ghandi

I have a question on Ghandi. Okay, my brother's 3rd grade teacher assigned him to do some kind of project on Ghandi for Black History month... Is Ghandi even black?

92. Song of Myself+English

Has anyone read Song of Myself by Walt Whitman?? I can't find any themes for it. So hard to understand. Would slavery be a theme? I need atleast 4 themes associated with Song of Myself.

93. Chemistry+Singe replacement

Balance the following equations if the reactions will occur. gold + oxygen Au + O2 --> ??????? barium + oxygen Ba + O2 --> ??? bismuth + oxygen --> Bi + O2 --> ??? help please. keep in mind this is single replacement

94. Reiny

Can u answer my last alg post?

95. Algebra 2 help

1. (3ã6 * 4ã6)^12 Answer :6^7 2. 3ã9 * 3ã6 / 6ã2 * 6ã4 Answer: 3 Can you guys show me how to work those? I got the answers from back of the book, but I have no idea how to work it. The number behind the square root sign is the nth.

Can someone reply to my previous post.

98. Math

Find two numbers whose sum is 50 and whose difference is 6. So I'm going to set up a system of equation. x + y = 50 x - y = 6 And I got x = 28 y = 22 Correct?

99. Alg III

Solve each absolute value equation. 3 + |x| = 5 My work: 3 + x = 5 or 3 + x = -5 x = 2 or x = -8 The book says that I am wrong. I do not know why.