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April 16, 2014

Search: Chemistry (mole question)

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chemistry.
Your question asks for 0.1 mole. So I would multiply molarity x volume in dm^3 and see which equals 0.1 mole. By the way, the answer choices aren't very clear; for example, 0.1 mole dm^3 is what? Does that mean 0.1 mole/dm^3 or does it have another meaning?
Thursday, November 5, 2009 at 11:52am by DrBob222

Chemistry
How many moles of Sulfur are in 1 mole of Al2(SO4)3 and If the densitry of a noble gas is 1.783 g/L at STP, that gas is.... My guess: Argon? Then theres a question that says "Which as the greater mole.... and it lists things like: 1 mole Of Ar 1 Mole of O How would you figure ...
Friday, February 15, 2013 at 2:36pm by Bryce

chemistry
For NO, 30 g is one mole. One mole contains Avogadro's number of molecules. That is 6.02*10^23 My question is: what reaction is being used to form H2O from NO? Perhaps it is 2H2(g)+2NO(g)--> N2(g)+2H2O(g) If so, each NO mole forms one H2O mole.
Saturday, December 22, 2012 at 10:13am by drwls

chemistry
percent by what? w/w? w/v; v/v; mole/mole? This is an exceedingly poor question. I hope the rest of the course you get better questions than this.
Monday, July 4, 2011 at 10:43am by bobpursley

chemistry
I would go with the + sign, also. A + B ==> C + D is read as 1 mole of A reacts with 1 mole of B to produce 1 mole of C + 1 mole of D.
Tuesday, February 3, 2009 at 11:38pm by DrBob222

Chemistry
The equation tells you that 1 mole HCl + 1 mole NaOH produces 1 mole NaCl and 1 mole H2O.
Tuesday, April 6, 2010 at 3:03pm by DrBob222

Chemisty (please read soon)
which will become a buffer in 1L of H2O? a) 0.3 mole KOH & 0.3 mole HBr b) 0.5 mole NH3 & 0.5 mole HCl c) 0.2 mole NaCl & 0.3 mole HCl d) 0.2 mole NaOH & 0.2 mole HBr e) 0.4 mole HC2H3O2 & 0.2 mole NaOH I think that the answer is e. Is that correct?
Sunday, April 29, 2012 at 11:03pm by Zac

Chemistry
I think you have answered the first question and second question correctly. For the third question, here is what should have happened Notice the equation is Na2SO4(aq) + CaCl2(aq) == CaSO4(s) + 2NaCl(aq) So 1 mole Na2SO4 reacts with 1 mole CaCl2 to produce 1 mole of the solid...
Thursday, November 25, 2010 at 5:43pm by DrBob222

Chemistry
a. Al2S3O12: three moles S in one mole of aluminum sulfate. b. 1.783*22.4 g/mole=39.9g/mole>>>Argon c. I dont know the question being asked. Greater mass? Greater what?
Friday, February 15, 2013 at 2:36pm by bobpursley

Chemistry
Mole of NaBr=(.893M)(.750L)= .6679 mole mole of Cl2= (1.00atm)(22.4L)=n(.0821)(273.15k) n= .998858 mole How do u determine the limiting reagent?
Friday, February 12, 2010 at 6:32pm by andy

Chemistry
It depends upon how you define greater. 1 mole NaCl = 1 mole Fe = 1 mole of anything else; however, 1 mole NaCl = 58.5 grams while 1 mole Fe = 55.85 grams and 1 mole H2 = 2 grams.
Friday, March 18, 2011 at 11:09pm by DrBob222

chemistry
Determine the theoretical yield of C when each of the following amounts of A and B are allowed to react in the generic reaction: A+2B-->3C 1) 1mol A; 1 mole B 2) 1mole A; 3 mole B 3) 2mole A; 2 mole B 4) 32mole A; 68 mole B
Wednesday, November 10, 2010 at 11:13pm by rachel

chemistry
SHOW WORK How many moles of helium occupy 26.4 L at a pressure of 103.0 kPa, and 10 degrees Celsius? A.) 0.03 mole B.) 0.86 mole C.) 1.16 mole D.) 32.72 mole
Wednesday, December 4, 2013 at 3:51pm by Caitlyn

chemistry
calculate the mole of HCl using m/Mr calculate the mole for water using the same formula add to two moles to get the total mole of the solution. divide the mole of HCl by the total mole to get your mole fraction.
Tuesday, June 11, 2013 at 8:20pm by bonjo

chemistry
Is the question about the mole ratio in the product or the mixture?? If the product is CuS, the mole ratio in the product is 1molCu/1molS=1 molCu/molS The mole ratio of the masses of the elements in any compound is definite, not dependent on the reactants ratio in making it.
Friday, January 1, 2010 at 5:55pm by GK

Chemistry
types of stoichiometry: Because chemical reactions are only mole-mole relationships there is really only one. However, you may not be given moles and have to convert mass to moles, or volume to moles Counting that mole to mole mass to mole volume to mole mass to mass volume to...
Monday, January 14, 2013 at 6:15pm by bobpursley

chemistry
16 g oxygen x (1 mole/32 g) = 0.5 mole. The molar volume of oxygen is 22.4 L/mole; therefore, 0.5 mole will occupy 11.2 L at STP.
Tuesday, October 27, 2009 at 10:10pm by DrBob222

chemistry
the solute is the HCl because it dissolved in water (a solvent). we have the mass so we can calculate the mole using m/Mr. the mole of water is also m/Mr the mole fraction is the mole of the solute divided by the total mole of the solution.
Tuesday, June 11, 2013 at 8:20pm by bonjo

chemistry
for this question How many liters of H2 gas at STP are produced when Zn reacts with 125 mL of 6.00 M HCl? my book answers it this way: 0.125 L x 6.00 mole HCl x 1 mole H2 x 22.4 L 1 L 2 mole HCl 1 mole = 8.40 L of H2 gas where did the 22.4L come from?
Wednesday, April 13, 2011 at 6:28am by Blain

Chemistry
you should know the formular to calculate all the question of the chapter of 'Reacting masses'. eg. mass / molar mass=no of mole no of mole*avagadros=no of particles ...and so on..
Saturday, November 5, 2011 at 9:11am by demolitrate

chemistry
I will do 1) for you in detail. A + 2B ==> 3C mols A = 1. How many moles of C will that form? Using the coefficients in the balanced equation, convert moles A to moles C. 1 mole A x (3 moles C/1 mole A) = 3 moles C. moles B = 1. How many moles of C will that form? Same ...
Wednesday, November 10, 2010 at 11:13pm by DrBob222

chemistry
Which of the following solutes dissolved in 1000 g of water would provide a solution with the LOWEST freezing point? A. 0.030 mole urea, CO(NH2)2 B. 0.030 mole acetic acid, CH3COOH C. 0.030 mole ammonium nitrate, NH4NO3 D. 0.030 mole calcium sulfate, CaSO4 E. 0.030 mole barium...
Sunday, June 20, 2010 at 3:23am by random

chemistry
The atmosphere composition is % by volume, not by mass. If we take the gases as ideal gases then because the same volume of any gas contains the same number of moles the % by volume is also the % by mole, and hence fraction by mole. 0.21 mole 0.78 mole 0.1 mole Thus because ...
Thursday, August 11, 2011 at 6:04am by Dr Russ

Chemistry
How is this question done? The percent abundance of deuterium (2H isotope) in naturally occurring hydrogen is 1.4x102 mole %. What mass, in g, of deuterium would be present in one mole of C6H12O6?
Saturday, May 16, 2009 at 2:39pm by Kearstyn

chemistry
if .5 mole of baCl2 is mixed with .2 mole of Na3Po4.Then maximum number of mole of Ba3(PO4)2 is
Saturday, March 29, 2014 at 11:48am by anu

Chemistry
N2 + 2O2 ==> 2NO2 No. You can think of this several ways. 1. The equation tells us 2 moles NO2 are given by 1 mole N2. We must divide 2moles NO2 by 2 to obtain 1; therefore, we must divide 1 mole N2 by 2 to obtain 1/2 mole. 1/2 mole N2 is the answer. 2. Use dimensional ...
Thursday, September 15, 2011 at 5:14pm by DrBob222

Chemistry
thanks !:) so then what would this one be ? What are the molar masses of the following compounds from the photosynthesis equation? CO2=___________g=1 mole H20=___________g=1 mole C6H12O6=________g=1 mole O2=________g=1 mole ??
Saturday, February 4, 2012 at 1:30am by Lyssa

Chemistry
Looks like the 1.0 mole of O2 is the limiting reagent. Only 0.5 moles of CH4 can react with it. So, when things are done, you are left with 0.5 mole CH4 (left over) 0.5 mole CO2 1.0 mole H2O
Monday, October 15, 2012 at 3:10am by Steve

Chemistry!
! mole of an ideal gas occupies 22.4 L at STP. 1 mole of a solid or 1 mole of a liquid depend upon dimensions and or density.
Saturday, July 10, 2010 at 5:30pm by DrBob222

Intro to Chemistry
25 ml = 0.025 L .025L * 1.585 mole/L = 0.0396 mole * 93.9g/mole = 3.72g NaCl
Monday, November 19, 2012 at 6:07am by Steve

Chemistry
V:1mole=1000cm^3:.174g Change the .176g to fraction of mole (.176/16) or V/mole= 1000cm^3/(.174/16 mole) I get about, for the volume per mole, 92liters. Must be really hot.
Saturday, November 3, 2007 at 7:04pm by bobpursley

Chemistry
V:1mole=1000cm^3:.174g Change the .176g to fraction of mole (.176/16) or V/mole= 1000cm^3/(.174/16 mole) I get about, for the volume per mole, 92liters. Must be really hot.
Saturday, November 3, 2007 at 7:04pm by bobpursley

chemistry
given the reactant amounts specified in each chemical eguation, determine the limiting reactant in each case: a. HCL+NaOH->NaCl+H2O 2.0 mole of HCl 2.5 mole NaOH b. Zn+2HCl->ZnCl2+H2 2.5 mole Zn 6.o mole HCl c. 2Fe(OH)3+3H2SO4->Fe2(SO4)3+6H2O 4.0 mole Fe(OH)3 6.5 mole...
Wednesday, March 3, 2010 at 6:43pm by christina

chemistry
For a given reaction, the rate constant doubles when the temperature is increasd from 27C to 49C What ite activation energy? Explain. a).347 KJ/mole b)25.5 KJ/mole c)31.5 KJ/mole d)52.7 KJ/mole
Wednesday, February 16, 2011 at 8:50pm by reginajones

Chemistry
1 mole of CO2 = 1 mole C. 2 moles H = 1 mole H2O etc.
Sunday, November 13, 2011 at 6:20pm by DrBob222

Chemistry
I don't know how to start this problem. Someone can help me please. One dm3 of a solution was prepared containing 0.0040 mole of Pb(NO3)2. The Ksp of PbCI2 for the existing conditions is 2.4 x 10^-4. From the list below, choose the smallest numbers of NH4CI that when added to ...
Sunday, May 23, 2010 at 10:35pm by Susie

Chemistry
0.05 mole of HCL is added to a liter of buffer containing 0.04 mole of NH3 and 0.03 mole of NH4CL. What is the ph? Kb= 1.8X10^-5
Saturday, April 17, 2010 at 8:58pm by Cathy

chemistry
You have to find the mass of 1 mole first. Then you will know what fraction of a mole you are working with one mole has 5 carbons your fraction of a mole has ? carbons
Thursday, February 21, 2013 at 6:54pm by JJ

Chemistry
the reaction is: 2HNO3 + Ca(OH)2 --> Ca(NO3)2 + 2H2O we know the mole of calcium hydroxide n=cv = 4.2mol/L x 0.025L = _____ this mole needs to be neutralized by the acid. so we need to calculate the mole of nitric acid using the mole ratio from the balanced equation; 2 mole...
Wednesday, June 5, 2013 at 9:47am by bonjo

AP Chemistry
From the equation 2 moles of K react to form 1 mole of H2 gas. At STP 1 mole of any gas occupies 22.4 litres. 0.400 mol of K will give 0.200 mole of H2 gas. Volume = 0.200 mole x 22.4 l mole^-1
Thursday, October 2, 2008 at 1:40am by Dr Russ

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 S/32.064g = .71 mole (Fe1.0 ...
Wednesday, January 21, 2009 at 6:04pm by Chopsticks

chemistry
construct the balance reaction equation of Acetic acid and NaOH. take note of the mole ratio calculate the actual mole(n) of NaOH reacting with acetic acid using n=cv use the mole ration to determine the mole of acetic acid from the reacted NaOH mole. calculate the ...
Monday, May 13, 2013 at 8:59am by bonjo

Chemistry
For NaCl, Van 't Hoff factor=2. Find the molality like you did for Urea. But remember, the question is asking how does ∆T change with different mass or mole ratios. grams of substance*( 1 mole/molecular weight)= moles of substance
Tuesday, February 26, 2013 at 8:31pm by Devron

Chemistry
I have a slight difference. 0.01 g x (1 mole C4H8/56.1 g C4H8) x (1 mole C/1 mole C4H8) x (12.01 g C/1 mole C)= 0.00214 g but we're allowed only 1 sig figure anyway which would be 0.002 g C.
Sunday, November 1, 2009 at 2:04pm by DrBob222

Chemistry
According to the balanced equation 6 moles of carbon dioxide will react with 6 moles of water to produce 1 mole of sugar and 6 moles of oxygen. What are the molar masses of the following compounds from the photosynthesis equation? CO2=___________g=1 mole H20=___________g=1 ...
Saturday, February 4, 2012 at 2:08am by Lyssa

Chemistry
I believe that, if you are calculating M, you must be dealing with Kc but the problem gives you Kp. I think what you need to do is to solve for mole fraction of each gas. mole fraction NO = moles NO/total moles. mole fraction O2 = moles O2/total moles. mole fraction NO2 = mole...
Saturday, October 16, 2010 at 8:23pm by DrBob222

chemistry
If you are forming lithium bicarbonate, LiHCO3, one mole of CO2 will combine with one mole of LiOH. One mole of LiOH has a mass of 24 g, so 36g is 2/3 mole. 2/3 mole of CO2 has a mass of 44/3 = 14.7 g
Saturday, November 5, 2011 at 1:37am by drwls

Chemistry
find the mole for HNO3 using n = MV where M is the molarity and V is the volume in Liters. then use the balance equation; KOH + HNO3 --> KNO3 + H2O the reaction is 1:1 so the mole you calculated for HNO3 is also the mole for KOH. i.e. mole KOH = mole HNO3. then convert the ...
Monday, June 10, 2013 at 1:29pm by bonjo

chemistry
A closed gas cylinder contains 0.500 mole H2, 0.300 mole O2, 1.200 mole CO2 at a temperature of 25 C and a pressure of 2.00 atm
Tuesday, October 30, 2012 at 2:33am by mamat

chemistry
mol of CH2 = 12+2 = 14 grams so 7/14 = .5 mol of CH3 equation 2CH2 + 3O2 --> 2CO2 + 2H2O so for every mole of CH2 we get one mole of water and one mole of CO2 so the result is .5 mole CO2 and .5 mole H2O
Wednesday, June 22, 2011 at 3:35pm by Damon

chemistry - DrBob222
Have you the balanced equation? If you have then step 3 is the easy step. Lets say that the balanced reaction is 2A +3B-> 2C +D this means that 2 moles of A yields 2 moles of C and one mole of D. So if we start with 1 mole of then this will form 1 mole of C and 0.5 mole of ...
Monday, November 15, 2010 at 1:51am by Dr Russ

CHEMISTRY
See your next question answered by drwls. Or use the formula mL x M = mL x M. The formula ia good for materials that react in a 1 mole to 1 mole ratio as HCl and NH3 or HNO3 and KOH.
Sunday, March 15, 2009 at 3:28am by DrBob222

Chemistry (mole question)
0.1 L * 1 mole/L = 10^-7 moles = 6.02 * 10^16 molecules. If you want atoms of solute, then that would be 3 times as many. If you also want to include the H2O, then you need to add the 100ml of H2O to the mix.
Friday, January 18, 2013 at 4:18am by Steve

chemistry
the balance equation is the overall net ionic equation. so use that to obtain the mole ratio between Na2Cr2O7 and KI. calculate the mole of sodium dichromate by m/Mr where m is 0.125g and Mr is molar mass. Then determine the mole of KI with using the mole of sodium dichromate ...
Monday, June 17, 2013 at 4:41pm by bonjo

Chemistry
Calculate the pressure and temperature at which 1.00 mole of CO gas will be in the same corresponding state as 1.00 mole of H2 gas at 2.00 bar and 30.0 degrees celsius. How do I approach this question?
Saturday, September 15, 2012 at 11:05pm by Josh

chemistry
1.1 mole/L Ca(OH)2 has 1.1 mole/L Ca +2 ions and 2.2 mole/L OH -1 ions. It matters not if you have one thimble full or a lake, the concentration is 1.1 mole/L Ca(OH)2 before it separates into the ions.
Thursday, January 21, 2010 at 6:32pm by DrBob222

Chemistry
And the book is right. If the mole fraction for ethanol is 0.3, then the mole fraction for 1-propanol is 0.7 since mole fractions must add to 1.00.
Thursday, March 18, 2010 at 12:27am by DrBob222

Chemistry (My previous post lacked something)
Question: At STP propane (C3H8) burns in oxygen to form 2.15L of carbon dioxide and water. The question is in 4 parts. I just need the first: a)What mass of oxygen is necessary for this reaction? So far I've got 2.15 L x 1 mole /22.4 L But when I try to do the mole ratio, I ...
Tuesday, January 14, 2014 at 11:10pm by Stefan

chemistry
a solution which contains one mole of a solute dissolved in one liter is a one Molar solution. For you first question, dissolve 1/2 mole into the solvent. That, as I recall is about 20grams of NaOH. Check it.
Tuesday, November 3, 2009 at 6:15pm by bobpursley

Chemistry
So will this be my equation: 14.4 moles of C atoms x (1 mole C3H8/3 mole C) = 4.8 mole C3H8 (?) but, i'm not sure how to do the one for H.
Friday, September 30, 2011 at 10:56pm by The Desperado

chemistry
What is the mass of 4.80 moles of MgCl2?My answer is: Mg=24.3 g/mole Cl2=35.5g/mole*2=71g/mole so, Mg 24.3+ Cl2 71= 95.3g/mole therefore 4.80 moles * 95.3 g/mole=471.84g Am i right pls correct me if i'm wrong thanks
Saturday, October 13, 2012 at 3:39am by chemdummy

Chemistry
Is this true or false? Thanks A mole of CCl4 is composed of one atom of carbon and four atoms of chlorine. I put false because it contain one mole of C 4 mole of Cl. Each mole have more than one atoms. Thanks
Tuesday, January 29, 2013 at 2:54pm by Shadow

chemistry
simply put, (0.75 C/s)(time)(1 mole e-/96485 C)(1 mole Cu/2 mole e-) = (0.10825-0.04175) time = 17,110.07 s = 4.7527 hr
Monday, June 18, 2012 at 2:15pm by Marc

Chemistry
At the start of the reaction there are 0.714 mole of H2, 0.984 mole of I2, and 0.886 mole of HI in a 2.70 L reaction chamber. Calculate the concentrations of the gases at equilibrium.
Saturday, February 23, 2013 at 6:55pm by Amy

Chemistry
does the mole ratio in this question affect the answer? a 2:1 mixture of O3 and O2 is allowed to effuse through a pinhole in a balloon.after a few seconds, the content of the balloon is analyzed. what will be the mole ratio of the gases in the balloon? Thanks!
Monday, April 26, 2010 at 1:36pm by Tokey

Chemistry
The equation looks balanced to me. Your question. Use the coefficients to make conversions from moles of one material to moles of another material. For example, 2 moles NaHCO2 will produce 1 mole CO2, 1 mole H2O, and 1 mole Na2CO3. How many mols NaHCO3 will it take to produce ...
Thursday, February 24, 2011 at 10:10pm by DrBob222

Chemistry
1. balance equation is; Na2Cr2O7 + 2KI --> 2NaI + K2Cr2O7 mass of Na2Cr2O7 = 0.125g mole of Na2Cr2O7 = m/Mr = 0.125g/Mr =___mole mole ratio Na2Cr2O7 : KI 1 : 2 2.calculate the mole of KI using the mole ratio above and mole of Na2Cr2O7. volume of KI = n/M where n is the mole...
Sunday, June 16, 2013 at 9:40pm by bonjo

CHEMISTRY
ok..so write the balance equation; H2SO4 + 2NH3 --> (NH4)2SO4 this shows that 1 mole of sulphuric acid react with 2 moles of NH3 to produce 1mole of ammonium sulphate. The question asks the mass of (NH4)2SO4 produced by 5.00g of NH3 is used. So focus only on these two; ...
Wednesday, June 19, 2013 at 6:31pm by bonjo

chemistry
Oxygen in the air is O2 like wise nitrogen is N2. mole fraction = n (mole of 1 component) / N (total mole of all components) Oxygen mole = 21 g /(32g/mol)=0.66 mole Nitrogen mole = 78 g / (28g/mol) =2.78 mole Argon mole = 1g / (40g/mol) =0.025 total mole =0.66 + 2.78 + 0.025 =...
Thursday, August 11, 2011 at 6:04am by student

CHEMISTRY
From one mole of glucose, you get two moles of ethanol. so the question is, how many moles of glucose do you have in 1000grams? molesglucose: 1000/molmassGlucose then molesethanol: twice that. Convert that to gramsEthanol by multiplying it by the mole mass of ethanol.
Sunday, April 17, 2011 at 11:43am by bobpursley

Chemistry
#1 is correct. #2 is not but you're half way there. 3.4 g H2 x (1 mole H2/2 g H2) = 1.7 moles H2. Now convert that to molecules. You must remember that 1 mole of H2 is 2 grams of H2 (or 22.4 L of the gas) but a mole and a molecule are not the same thing. 1 mole of H2 contains ...
Tuesday, April 7, 2009 at 4:14pm by DrBob222

chemistry
It depends upon the chloride formed. Fe + Cl2 ==> FeCl2 (iron II chloride) 2Fe + 3Cl2 ==> 2FeCl3 (iron III chloride). In case 1, 0.1 mole Fe will react with 0.1 mole Cl2. (that's 0.1 mole Fe x (1 mole Cl2/1 mole Fe) = 0.1 x 1/1 = 0.1 mole Cl2). In case 2, 0.1 mole Fe ...
Saturday, November 28, 2009 at 2:50pm by DrBob222

random question
what words have the word or sound of 'mole' in the. this is for a science project i am doing. we are given out lines of the animal a mole and we have to make a mole but have like a theme to it kinda. like someone did a camel(camole) thanks
Monday, May 9, 2011 at 4:01pm by Rebekah

chemistry question
why is it that when an unknown carbonate of group one or two (inc H) reacting w/ HCl, the mole ratio is 1:1
Tuesday, December 27, 2011 at 5:56pm by chemistry

chemistry.
CH4 + 2O2 ==> CO2 + 2H2O Convert 8.0 g CH4 to moles. moles = grams/molar mass. 8.0/16 = 0.5 mole CH4. Now look at the equation. The equation tells us that 1 mole CO2 is formed for 1 mole CH4; therefore, 0.5 mole CO2 will be formed by 0.5 mole CH4.
Monday, September 28, 2009 at 3:14pm by DrBob222

chemistry
ensure the equation is balanced. obtain the mole ratio between Zn and Ag i.e. 1 mole of Zn produces 2 moles of Ag convert the mass of Ag (m=5.4g) into mole using m/Mr where Mr is the molar mass of Ag. take note of that mole for Ag and use it to calculate the mole for Zn, using...
Wednesday, June 12, 2013 at 12:58pm by bonjo

Chemistry
Let's suppose we start with 1 mole of material. That means we will have 0.3 mole ethanol and 0.7 mole of water. Now convert 0.7 mole water to kg. That will be 0.7 mole x (18.015 g/mole) x (1 kg/1000 g) = ?? kg solvent (water). molality = m = moles ethanol/kg solvent. You know ...
Saturday, October 2, 2010 at 9:21pm by DrBob222

Chemistry
0.37 mole NH4Cl dissolved in water will be 0.37 mole NH4Cl. Each mole NH4Cl contains two ions; i.e., NH4^+ and Cl^-. Therefore, 0.37 x 2 = 0.74 mole ions in solution.
Monday, November 2, 2009 at 10:25pm by DrBob222

Chemistry
mole? Silly question.
Thursday, February 24, 2011 at 10:16am by bobpursley

chemistry
Determine moles CO2. Then remember that there are 6.02 x 10^23 molecules in a mole of anything. Then remember that there is 1 mole of C atoms in a mole of CO2.
Wednesday, January 20, 2010 at 7:51pm by DrBob222

Chemistry
1. construct a balance equation for HCl and Zn reaction and note the mole ratio between HCl and Zn. 2. calculate the mass of Zn from the ore i.e. 36.0% of 7.55g gives the mass of Zinc. 3. Calculate the mole of zinc using n = m/Mr where Mr is the molar mass of zinc and m is the...
Sunday, June 16, 2013 at 11:42pm by bonjo

Chemistry
0.334 m = 0.334 mole/kg solvent. 1000g x (0.1 mole/0.334 mole) = ?? g soln to contain 0.1 m
Sunday, April 24, 2011 at 12:03pm by DrBob222

organic chemistry
%ee = %1-%2 = ?? If we call the mole fraction of the A isomer x (with specific rotation of +13.0) and the mole fraction of the B isomer 1-x (with a specific rotation of -13.0), then will it not be true that 13.0*x + [-13.0*(1-x)] = -9.75 Solve for x and 1-x. Multiply those by ...
Saturday, November 15, 2008 at 1:04am by DrBob222

Chemistry
At the start of the reaction there are 0.714 mole of H2, 0.984 mole of I2, and 0.886 mole of HI in a 2.70 L reaction chamber. Calculate the concentrations of the gases at equilibrium. The equilibrium constant is 54.3.
Saturday, February 23, 2013 at 7:03pm by Amy

chemistry
6 g is what part of a mole if a mole of K is 39 grams? delta H = -437 kJ/mol for the reaction. So it will be how many kJ for the part of the mole K you have?
Tuesday, December 30, 2008 at 12:55pm by DrBob222

chemistry
Start from the equation for the reaction O2 + 2H2 -> 2H2O so 1 mole of O2 reacts with 2 moles of H2. 75 g of H2 gas contains 75 g/2 g mole^-1 = 37.5 mole this will react with 37.5 mole/2 moles of O2 (from the equation) hence calculate the number of grams of O2 gas (molar ...
Thursday, January 13, 2011 at 2:52am by Dr Russ

Last Chemistry Question!
You betcha . That's one of the first numbers you memorize. 22.4 L is the volume occupied by a (1)(one) mole of a gas (technically an ideal gas) at STP (standard temperature and pressure). So if you have 2 moles of a gas at 1 atm and 273K, it will occupy 22.4 x 2 = 44.8 L. (1 ...
Sunday, February 19, 2012 at 11:21pm by DrBob222

Chemistry
You also know that 1 mole SrSO4 gives 1 mole Sr^+2 and 1 mole SO4^-2. The problem gives you the concn of Sr^+2 as 5 x 10^-4, sulfate is the same, substitute into the expression you wrote for Ksp and you have it.
Wednesday, March 31, 2010 at 7:42am by DrBob222

chemistry
The equation tells you that 1 mole CaCO3 = 1 mole CaO = 1 mole CO2; therefore, 3 moles CaCO3 will produce 3 moles of both CaO and CO2. OR you can use the dimensional approach this way, 3 moles CaCO3 x (1 mole CO2/1 mole CaCO3) = 3 moles CO2. The numbers in the factor within ...
Wednesday, October 5, 2011 at 4:18pm by DrBob222

Chemistry
Barium Nitrate is a not very soluble nitrate. Calculate the Ksp (at 25 degrees) from the following ΔG's: Ba2+ = -561kj/mole NO3 1- = - 109kj/mole Ba(NO3)2 = - 797 kj/mole
Wednesday, May 2, 2012 at 5:07pm by tina

Chemistry
The sodium ion is a spectator ion in this reaction, i.e. it does not take part. Thus we can ignore the chemistry. Number of moles at start 3.00 L x 2.37 mole L^-1 Because 1 mole of NaCl gives 1 mole of Na+ in solution. volume at end = 3.00 L + 2.00 L =5.00 L so concentration ...
Friday, May 6, 2011 at 1:17am by Dr Russ

chemistry
The particles of which sample of LiCl(s) have the same average kinetic energy as the particles in a 2.0 mole sample of NH3(g) at 25 degrees celcius? a) 1.0 mole @ 75 degrees celcius b) 12.0 mole @ 50 degrees celcius c) 3.0 mole @ 25 degrees celcius d) 4.0 mole @ 0 degrees celcius
Saturday, May 15, 2010 at 10:58pm by Anonymous

Chemistry
Which of the following has the greatest entropy? A.1 mole NaCl (g) at 25C B.1 mole NaCl (g) at 50C C.1 mole NaCl (l) at 50C D.1 mole NaCl (s) at 100C I know that gases have the highest entropy and the higher the temperature the higher the entropy...so i am leaning toward b. ...
Sunday, November 15, 2009 at 4:54pm by Christina

Chemistry
First, you write the equation. PhCOOH + NaOH ==> PhCOONa + H2O So you used 20 mL of 0.5 mole/L which means you used 0.50 x 0.02 = 0.01 mole NaOH. Since the reaction is a 1:1 mole ratio, it will require 0.01 mole benzoic acid. How many grams is 0.01 mole benzoic acid? You ...
Wednesday, January 13, 2010 at 8:52pm by DrBob222

Chemistry
Question: A solution of Silver nitrate, AgNO3, contains 1.08 grams in 250 cm3. What is its molarity? Solution: Molar mass of Silver nitrate = 108 g/mole. n(AgNO3) = 1.08 grams of AgNO3 x 1 mole of AgNO3108 grams AgNO3 = 0.01 mole. Number of moles in 1 dm3 = 0.01 mole x 1000/...
Sunday, December 30, 2012 at 3:44pm by Katie

Chemistry
Convert 13.38 g Of Ag to moles by dividing by the gram-atomic mass of Ag. 1 mole of Ag produces 1 mole of AgNO3 1 mole of AgNO3 + 1 mole NaCl ---> 1 mole AgCl so..... Moles of Ag = Moles of AgNO3 = moles of NaCl (Moles of NaCl) / (molarity of NaCl) = liters NaCl
Tuesday, September 30, 2008 at 9:33pm by GK

chemistry
a is right. b. There is 1 mole Na ion in a mole of NaCl (from the formula). c. same for Cl ion. d and e. There are 6.02 x 10^23 ions in a mole of ions. You know the mole of Na ions and Cl ions from b and c.
Monday, August 30, 2010 at 1:57pm by DrBob222

chemistry - thank you:)
first construct the balance equation for sulphuric acid and aluminium hydroxide reaction. take note of the mole ratio between the two compound from your balanced equation. determine the actual mole of Al(OH)3 using c=n/v where c is the concentration in mol/L, n is the unknown ...
Monday, May 13, 2013 at 1:51am by bonjo

chemistry
2Na + 2H2O ==> H2 + 2NaOH HCl + NaOH ==> NaCl + H2O 0.32 g Na x (1 mole/23 g Na) = ?? moles Na. You know from the equation that 2 moles Na will produce 2 moles NaOH (of course 1 mole produces 1 mole) and you know 1 mole HCl reacts with 1 mole NaOH. Therefore, the moles ...
Tuesday, November 17, 2009 at 10:35pm by DrBob222

chemistry asap
..........NaOH + HCl ==> NaCl + H2O moles NaOH = grams/molar mass = 40/40 = 1.o mole. moles HCl = 36.5/36.5 = 1.0 mole So 1 mole reacts with 1 mol to produce 1 mole of NaCl(58.5g) and 1 mole H2O. grams H2O = mole x molar mass = ??
Thursday, October 6, 2011 at 9:33pm by DrBob222

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