Search: how many moles of H2O molecule are contained in 3.00 mol of FeSO4*5H2O

Number of results: 17,726

Chem
No, you calculated the number of atoms in the molecule. The question is for moles. There are two moles of hydrogen per mole of H2O and one mole 0f oxygen per mole of H2O. Therefore, for 2 moles of H2O, there are 4 moles of hydrogen and 2 moles of oxygen.
Monday, July 6, 2009 at 4:22pm by DrBob222

Chemistry/Math
1 is ok. Your answer for 2 defines 1 mol as 6.022 x 10^23 molecules which we already know; in act, I wrote that in mu response. You want 1000 g converted to moles. 1000 g x (1 mol H2O/18.015 g H2O) = ?? moles. Then ?? moles H2O x (6.022 x10^23 molecules/1 mole H2O) = xx ...
Saturday, August 21, 2010 at 1:01pm by DrBob222

Chemistry
*10 moles of Na2SO4 is 3*10=30 moles of particles. *Convert 0.500 kg H2O to moles. *Total moles = 30 + moles of H2O *Mole fraction of H2O = X(H2O) = (moles H2O) / Total moles. *Look up the vapor pressure of H2O at 30ºC = P(H2O) *Vapor pressure of solution = [X(H2O)]*[P(...
Saturday, September 5, 2009 at 9:38pm by GK

Chemistry- please check my work
•Find the moles of MgSO4 by dividing 95.00g by the formula mass of MgSO4. •Multiply the moles of MgSO4 by 3 ions / mole to get the moles of ions in solution. •Convert 95g of H2O to moles. •Add moles of ions to moles of H2O to get total moles. •The ...
Monday, February 23, 2009 at 9:19pm by GK

Chemistry
The molecular formula is as followed: 6NO + 4NH3 --->5N2 + 6H2O The ratio of moles of NO to H2O is 1 to 1. 225.0g of NO/30.01 g of NO/mol= moles of NO Moles of NO=Moles of H20 Moles of H2O *18.02g of H2O/mol= mass of H2O
Tuesday, January 29, 2013 at 10:50pm by Devron

Chemistry
1. Write the balanced chemical equation for the reaction: 2C2H6 + 7O2 = 4CO2 + 6H2O 2. Determine moles C2H6 and O2. moles C2H6 = 20.0 grams C2H6 x (1 mole C2H6/30.0692 grams C2H6) = 0.665 moles C2H6 moles O2 = 60.0 grams O2 x (1 mole O2/32 grams O2) = 1.875 moles O2 3. ...
Thursday, March 14, 2013 at 4:53pm by pls help

physics
first, find the number of moles. Then, in each molecule, the H2O has 2 from the H, 6 from each O, or 8 electrons. numberelectrons= moles*avagnumber*8
Wednesday, July 6, 2011 at 4:42pm by bobpursley

Chemistry
You need to correct the equation. 2H2 + O2 ==> 2H2O 65.00 g H2O = how many moles? 65/18 = xx moles H2O. moles oxygen = 1/2 moles H2O, then convert to grams oxygen. moles H2 = same as moles H2O, convert to grmas hydrogen. You must have
Wednesday, October 13, 2010 at 2:11pm by DrBob222

chemistry repost!!
Molarity is moles of solute (acetic acid) per liter of solution. I will call acetic acid X to save typing. [Moles X/liter solution] = [Moles X/Moles H2O]x [Moles H2O/liter] =[Moles X/Moles H2O]x[MolesH2O/g H2O][gH2O/g solution][g solution/liter] =(.325/.675)(1/18)MolesX/g/H2O[...
Saturday, November 10, 2007 at 9:14am by drwls

Chemistry
H2O is a molecule, not an atom. If you want to convert 458166 molecules of H2O to moles, it is 458166/6.02E23 = ?
Tuesday, November 6, 2012 at 12:03am by DrBob222

Chemistry
H occurs as a diatomic molecule (as does oxygen) so the equation should be 2H2 + O2 ==> 2H2O (10 moles H2 will produce 10 moles H2O --ONLY IF there is sufficient oxygen present and that will be 5 moles oxygen needed for 10 moles H2). 1 mole H2O has a molar mass of 18 ...
Saturday, January 15, 2011 at 8:09pm by DrBob222

Chemistry
Well, it's a long story. First, I misread the problem and worked it initially (and typed all of it out) and discovered before I punched the post answer button that the problem did NOT ask for H2 but for H2O. So I went back and corrected here and there and posted the ...
Tuesday, October 19, 2010 at 7:39pm by DrBob222

chemistry
I would use PV = nRT and solve for n = number of moles H2O in the vapor phase. Compare this with moles H2O in 1.15 g. The difference, if any, will be the moles H2O in liquid form.
Sunday, December 5, 2010 at 5:21pm by DrBob222

Chemistry/Math
1. density of water is 1 g/mL. 1L = 1000 mL. mass = volume x density mass = 1000 mL x 1 g/mL = ?? 2&3. Convert ?? grams/day to moles. moles = grams/molar mass H2O. There are 6.022 x 10^23 molecules of water in 1 mole H2O and there is 1 atom oxygen in 1 molecule H2O. Can ...
Saturday, August 21, 2010 at 1:01pm by DrBob222

About Chemistry
moles urea = 35 g/molar mass urea. moles H2O = 75 g/molar mass H2O. total moles = moles urea + moles H2O. mole fraction H2O = moles H2O/total moles Psoln = XH2O*Ponormal
Wednesday, September 15, 2010 at 10:36pm by DrBob222

Last Chemistry Question!
You don't unless it's moles of a solvent. You could have 5 moles water and calculate the volume that would occupy if you knew the density. 5 mols H2O x (18 gH2O/1 mol H2O) = grams H2O, then mass H2O = volume H2O x density H2O
Sunday, February 19, 2012 at 11:21pm by DrBob222

Chem
Not a catalyst. N has the same oxiation state on both sides; therefore, it can't be oxidized or reduced or an oxidizing or reducing agent. This reaction is like the ionization of water. Look at what it does. H2O + H2O ==> H3O^+ + OH^-. One molecule of H2O has acted ...
Tuesday, April 22, 2008 at 10:34pm by DrBob222

chemistry
Compute the number of moles of NO2 and H2O to determine which reactant is limiting. There are 55.2/18 = 3.07 moles of H2O and 225/46 = 4.89 moles of NO2. There is more than enough H2O available to react with NO2, so NO2 is the limiting reactant. 4.89 moles of NO2 will resct ...
Sunday, January 24, 2010 at 1:51am by drwls

Chemistry
The reaction is: Al2S3(s) + 6H2O(l) --> 2Al(OH)3(s) + 3H2S(g) (40.5gAl2S3)/(150.16 g/mol) = 0.270 moles Al2S3 (0.110 mol H2O)(1 mol.Al2S3/6mol.H2O)=0.0183mol Al2S3 NEEDED. We have 0.270 moles Al2S3 AVAILABLE. So, H2O is the limiting reagent. The moles of Al(OH)3 ...
Thursday, May 21, 2009 at 5:58pm by GK

Chemistry
1:1:1 1 molecule H2O to 1 molecule SO3 to 1 molecule H2SO4.
Thursday, November 11, 2010 at 5:19pm by DrBob222

chemistry
This problem can not be solved without the volume of NaOH used in the titration. 0.2079 g/molar mass H2C2O4.H2O = moles H2X2O4.H2O (note: you typed H2O one place and 2H2O another). From the equation, moles NaOH = twice the moles of the oxalate. Then MNaOH = moles NaOH/L NaOH.
Wednesday, May 11, 2011 at 10:18pm by DrBob222

chemistry
I don't know what you're reacting it with but with a formula of CH3OH for methanol, probably not more than 1 molecule H2O/1 molecule of CH3OH or 14 H2O molecules overall.
Monday, November 8, 2010 at 7:51pm by DrBob222

chemistry
What is the theoretical yield? 1.3 moles H2S x (2 moles H2O/2 moles H2S) = 1.3 moles x (1/1) = 1.3 moles H2O produced. g H2O = moles x molar mass = 1.3 moles x 18 g/mol = about 23 estimated theoretical yield. Therefore, percent yield = (18.7/theoretical yield)*100 = ?
Sunday, December 11, 2011 at 9:02pm by DrBob222

Chemistry
2C2H6+7O2=4CO2+6H2O how many moles of H2O are produced when a mixture of 0.427 moles of O2 and 0.150 moles of C2H6 is burned, iv already found moles of H2O for them separately.
Sunday, March 17, 2013 at 3:21pm by Angela

Chemistry
You have 48.1/150.161 = 0.3203 mols Al2S3. You have 6.00g/18.015 = 0.333 moles H2O. The problem tells you H2O is the limiting reagent so convert moles H2O to moles Al2S3 to see how much will be used. 0.333 x (1 mole Al2S3/6 moles H2O) = 0.333 x (1/6) = 0.0555 moles. Convert 0....
Friday, June 4, 2010 at 8:45pm by DrBob222

chemistry
moles lactose = grams/molar mass moles H2O = moles/molar mass mole fraction H2O = moles H2O/total moles. Psoln = XH2O*PoH2O
Monday, November 7, 2011 at 3:11pm by DrBob222

college - chem
Do you mean how do you KNOW the number of moles H2O in a hydrate or how do you determine the number of moles from experimental data? For #1, experience. For #2, calculate number moles of the salt. Calculate number of moles H2O from the experiment. Then find the moles H2O/1mole...
Tuesday, September 14, 2010 at 1:50pm by DrBob222

chem
PH2O = Xsoln*PoH2O 10% urea = 10g urea/(10g urea+90g H2O) moles urea = grams/molar mass urea. moles H2O = grams/molar mass H2O. XH2O = moles H2O/total moles. Then plug this X for H2O into the equation at the top, multiply by 55.3 mm.
Tuesday, June 7, 2011 at 6:28am by DrBob222

Chemistry
You are correct that P2O5 is the limiting reagent. You already have the moles P2O5 from your previous calculation. Convert that to moles H2O. Convert moles H2O to grams. Subtract from the original 15.2 to determine the amount H2O remaining. Post your work if you get stuck. 13....
Tuesday, February 5, 2008 at 3:09pm by drbob222

chemistry
Calculate moles glycerin. moles = grams/molar mass Calculate moles H2O. Use density to obtain mass, then moles = grams/molar mass. X = mole fraction H2O = mols H2O/total moles. Psoln = XH2O*PoH2O
Saturday, February 12, 2011 at 4:36pm by DrBob222

chemistry
This is a limiting reagent problem. How do I know that? Because BOTH reacts are given. Use PV = nRT to determine moles NH3. Use PV = nRT to determine moles O2. Using the coefficients in the balanced equation, convert moles NH3 to moles H2O. Do the same to convert moles O2 to ...
Saturday, November 20, 2010 at 7:40pm by DrBob222

Chemistry
CoCl2 = 0.88 g H2O = 1.62-0.88 = 0.74 g Convert to moles. moles CoCl2 = 0.88/molar mass moles H2O = 0.74/molar mass. Now find the ratio of moles H2O to one(1) mole CoCl2. The easy way to do that is to divide moles CoCl2 by itself, then divide the moles H2O by the same small ...
Tuesday, April 5, 2011 at 6:56pm by DrBob222

chemistry
2C4H10 + 13O2 ==> 8CO2 + 10H2O Use the coefficients in the balanced equation to convert from moles of one thing to moles of any other in the same equation. moles butane = 3.5 moles H2O x (2 moles butane/10 moles H2O) = 3.5*(2/10) = ??
Thursday, November 4, 2010 at 1:27am by DrBob222

Chemistry
This is a limiting reagent problem. How do I know that. Because BOTH reactants are given. Basically, what we do is work two simple stoichiometry problems, identify the limiting reagent as the one producing the smaller amount of product. CH4(g) + 2 O2(g) => CO2(g) + 2 ...
Monday, November 29, 2010 at 11:41pm by DrBob222

AP Chemistry
If you had shown what you did we could tell you what you did wrong. moles C3H8O3 = grams/molar mass moles H2O = (338 mL*0.992 g/mL)/molar mass mole fraction H2O = moles H2O/total moles. vap pressure water = moles fraction H2O x normal vap pressure water. I get 49.96 in a ...
Tuesday, January 25, 2011 at 7:31pm by DrBob222

chemistry
2H2 + O2 ==> 2H2O Assuming the 10 moles H2 had all the oxygen needed to react completely, then 10 moles H2 x (2 moles H2O/2 moles H2) = 10 moles H2 x 2/2 = 10 x 1/1 = 10 moles H2O? 10 moles x 18.015 g/mol = 180.15 grams. If we use the density of water as 1.00 g/mL, then...
Monday, September 21, 2009 at 9:17pm by DrBob222

Chemistry
convert grams to moles then use the equatino to do moles of Na to moles of H2O then convert moles of H2O to molecules by using avogadros number (6.022e23) I believe
Thursday, January 10, 2013 at 4:56pm by Samantha

chemistry
XMgCl2 = moles MgCl2/(moles MgCl2 + moles H2O) XH2O = moles H2O/(moles MgCl2 + mols H2O)
Thursday, March 3, 2011 at 12:35pm by DrBob222

Chemistry
You work it the same way you do any stoichiometry problem. You know Na is the limiting reagent, it will be completely consumed; therefore, how much H2O must be used according to the equation? It must be 4.00moles Na x (2 moles H2O/2 moles Na) = 4.00 x (1) = 4.00 moles H2O. You...
Thursday, January 27, 2011 at 11:56pm by DrBob222

chemistry
It's 1.5 m which means 1.5 moles glucose in 1 kg solvent. moles glucose = 1.5 moles in 1000 g H2O = 1000/18.015 = ?? Then XH2O = moles H2O/total moles.
Sunday, December 11, 2011 at 4:50pm by DrBob222

chemistry
Is that 15% w/w or w/v? If w/w, then 15% means 15 g HNO3 in 100 g solution or 15 g HNO3 in (15 g HNO3 + 85 g H2O). Convert 15g HNO3 to moles. moles = grams/molar mass. Convert 85 g H2O to moles. Then XHNO3 = moles HNO3/total moles. XH2O = moles H2O/total moles. Post your work ...
Tuesday, December 13, 2011 at 10:33pm by DrBob222

Chemistry
Yes, ammonia is NH3 and water is H2O. We can't draw structures on these boards. However, for H bonding between ammonia molecules, the N of one molecule has the usual &nbsp&nbsp .. H-N-H &nbsp&nbsp | &nbsp&nbsp H (I hope that looks ok). To show H ...
Monday, February 9, 2009 at 8:40pm by DrBob222

chemistry
When all are gases one can use L as if they were moles. 8.6L H2 x (2 moles H2O/2 moles H2) = 8.6*1 = 8.6L 4.3L O2 x (2 moles H2O/1 mole O2) = 4.3*2 = 8.6. This is a limiting reagent problem in which NEITHER is limiting; i.e., you will form 8.6 L H2O as a gas.
Thursday, March 10, 2011 at 12:14am by DrBob222

chemistry
0.1850*0.400 = ?moles HCl 0.1525*0.500 = x moles NaOH I have 0.07625 moles NaOH and 0.07400 moles HCl; therefore, 0.07400 moles H2O should be formed. 56 kJ/mol x moles H2O formed = heat released.
Sunday, November 13, 2011 at 4:00pm by DrBob222

chemistry
How many moles glucose do you have in 150 grams glucose? moles = grams/molar mass = ??. How many molecules do yo have in ?? moles? There are 6.02 x 10^23 molecules in a mole so how many molecules will you have in ?? moles. There are 6 C atoms in 1 molecule so molecules in ?? ...
Saturday, February 20, 2010 at 11:50pm by DrBob222

chemistry
You are making it way too complicated. 1 mole CO2 x (6 moles H2O/4 moles CO) = ??moles H2O
Tuesday, July 27, 2010 at 9:33pm by DrBob222

chemistry
Ag2S ==> 2Ag^+ + S^-2 0.250 moles Ag2S will give you 2x0.250 moles Ag because the formula tells you there are 2 Ag ions for each Ag2S molecule. The moles of sulfur will be 1x0.250 because there is 1 atom S for each molecule of Ag2S. See my previous response for moles ...
Monday, March 16, 2009 at 4:16pm by DrBob222

Physics
1 mole of H2O has Avogadro's number of O atoms (one per molecule). 1 mole of O2 gas has twice Avogadro's number of O atoms (two per molecule) You need two moles of H2O to have as many O atoms as one mole of O2.
Monday, November 16, 2009 at 11:49pm by drwls

Chemistry Pretest
Consider the following balanced equation. 2 H2 + O2 ---> 2 H2O Which of the following statements is false? a) One molecule of O2 will react with 2 molecules of H2 b) One mole of O2 will react with 2 moles of H2 c) The complete reaction of 32.0 g of O2 will produce 2 ...
Friday, September 28, 2012 at 7:00am by Sarah

Chemistry
delta P = Xsolute*P<su>osolvent 483 = Xsolute*525.8 X = ?? KNO3 dissociates into two particles so take half of that = xx Then moles KNO3/(total moles) = xx moles H2O = 286.9/18.015 = yy If we let Y = moles KNO3, then [Y/(Y+moles H2O)] = xx and solve for Y, then Y...
Sunday, April 24, 2011 at 2:33am by DrBob222

Chemistry
Psoln = XH2O*PoH2O Solve for XH2O XH2O = (moles H2O/total moles) Plug in X, n for H2O and n for glucose and solve for n glucose, then grams glucose = moles x molar mass. Post your work if you get stuck.
Sunday, February 13, 2011 at 1:11pm by DrBob222

chemistry
This is a limiting reagent problem. 1. Convert 142 g ClO2 to moles. 2. Convert 33.0 g H2O to moles. 3a. Using the coefficients in the equation, convert moles ClO2 to moles HCl (you may use HClO3 if desired but it's simpler to use HCl). 3b. Convert moles H2O to moles HCl ...
Monday, February 2, 2009 at 9:31pm by DrBob222

Chemistry--- Roxanne
CoCl2·6H2O ----> CoCl2(s) + 6H20(g) ****H2O is lost as a gas. 2g of H20*(1 mole/18 g of H2O)=moles of H20 moles of H2O*(1 mole of CoCl2/6 moles of H20)= moles of CoCl2 moles of CoCl2*(129.89g/1 mole)= mass of CoCl2
Sunday, March 3, 2013 at 6:42am by Devron

Chemistry
To make things a little easier to type, let's realize that CH3COOH (acetic acid and written HC2H3O2) can be called HAc where H is the terminal H of the COOH and Ac stands for the remainder of the molecule. NaOH + HAc ==> NaAc + H2O moles NaOH you have. 0.1 M x 0....
Wednesday, October 28, 2009 at 8:53pm by DrBob222

Chem ques.
To add some info provided by Christina. A molecule will be polar IF there is a difference between the electronegativity of the central atom and the other atoms attched AND if it is not a symmetrical molecule. Almost all atoms have a difference in electronegativity (EN), even C...
Sunday, November 25, 2007 at 6:22pm by DrBob222

chem
2H2O ==> 2H2 + O2 54.0 mL H2O = 54.0 grams. Convert 54.0 grams H2O to moles. moles = grams/molar mass Using the coefficients in the balanced equation, convert moles H2O to moles H2. Now use PV = nRT to convert moles H2 to volume H2 at the conditions listed. Remember T ...
Tuesday, June 28, 2011 at 7:56pm by DrBob222

chemistry
Let's call acetic acid HAc. 5.00% HAc by mass means 5.00 g HAc in 100 g solution. moles in 5.00 g = 5.00/molar mass HAc. You can do the math. The 100 g soln is made of 5.00 g HAc 95.0 g H2O. moles H2O in 95.0 g H2O = 95.0/molar mass H2O. You can do the math. mole fraction ...
Monday, October 18, 2010 at 8:25pm by DrBob222

Chemistry- Empirical Formula
6.63 mg H2O x (2 moles H/1 mole H2O)x (1 mole H2O/18.015 g H2O) = 0.736 g hydrogen. 1.46 mg N mg N + mg H = 1.46 + 0.736 = 2.196 mg and subtract that from the sample mass = 9.71 mg and we have 9.71-2.196 = 7.51 mg C. Now convert mg of each to moles and calculate the ratio. ...
Monday, April 19, 2010 at 9:36pm by DrBob222

Physical Chemistry
For a. Assume you have 1 mole of solution; therefore, you will have 0.0195 moles FeCl3 and 0.9805 moles H2O. 0.9805 moles x molar mass = 17.663 g H2O and since molality = moles/kg solvent that will be 0.0195 moles/0.017663 = ??m. Round to 3 s.f. Check my arithmetic.
Monday, February 15, 2010 at 1:45pm by DrBob222

chemistry
You should learn where the arrow keys are on your calculator and use them. --> or ==> This is a limiting reagent problem and I work these the long way by solving two stoichiometry problems and taking the smaller value. Convert 4.90 g H2 to moles. moles = grams/...
Monday, December 12, 2011 at 8:38pm by DrBob222

college chemistry
Moles BaCl2.2H2O = grams/molar mass moles BaCl2.2H2O x (2 moles H2O/1 mole BaCl2.2H2O) = moles BaCl2.2H2O x 2/1 = ?? mass H2O = moles H2O x molar mass H2O Post your work if you get stuck.
Tuesday, September 15, 2009 at 9:37pm by DrBob222

Chemistry
acetone = Ac2O I would try something like this. Take some value of g H2O, say 18 g (you may need to use more precise numbers than I). moles H2O = 18/18 = 1 mole. Then XH2O = 0.765 = (1 mole H2O/1 mole H2O + x moles Ac2O). Solve for x moles Ac2O. Convert mols Ac2O to grams Ac2O...
Thursday, September 23, 2010 at 8:43pm by DrBob222

chemistry
Note the correct spelling of celsius. Psoln = XH2O*Pnormal Substitute for Psoln 114.9, look up vapor pressure of H2O at 55 C and substitute for Pnormal, solve for XH2O. Then moles H2O/(moles H2O+moles unknown) = XH2O from above. Substitute moles H2O (from grams/molar mass) and...
Saturday, December 4, 2010 at 11:17pm by DrBob222

Chemistry
g H2O = 15.01-9.6 = ?? moles water = grams/molar mass H2O. moles CuSO4 = grams/molar mass. Divide moles CuSO4 by itself (which gives you 1.000), then divide moles H2O by the same number. That will be X.
Saturday, October 9, 2010 at 6:04pm by DrBob222

Chemistry
Reverse the equation to be H2O (g) --> H2O (l) delta H= -44kJ There are 9.0 grams of H2O (g) Find moles of the gas: 9.0/16= .50 moles 44 times .50 =22 kJ evolved
Monday, November 15, 2010 at 6:10pm by Nina

Chemistry
Two important things about chemistry. 1. ALWAYS write an equation and balance it. 2. Chemistry works with moles. Therefore, change g to moles first thing you do. You have the equation. Now change the 3.4 g H2 to moles. moles = grams/molar mass 3.4 g/2.016 = 1.686 moles. Now ...
Tuesday, October 19, 2010 at 4:57pm by DrBob222

AP chemistry
Write the equation. Convert 25.0 g H2O to moles. Using the coefficients in the balanced equation, convert moles H2O to moles H2. Convert mole H2 to L by volume = 22.4 x moles. Post your work if you get stuck. Convert moles
Thursday, January 6, 2011 at 8:41pm by DrBob222

Chemistry
mole fraction sucrose = 0.2 mole fraction water = 0.8 You want 200 g water; how many moles is that? moles = g/molar mass H2O = 200/18.015 = about 11 moles but you need to do it more precisely than that. Then (11 moles H2O/total moles) = 0.8 Solve for total moles, about 14. If ...
Monday, October 11, 2010 at 5:23pm by DrBob222

Chemistry
How much H2O could you get if you used 8.00 moles NH3 and all of the oxygen needed. That will give you 8.00 x (6 moles H2O/4 moles NH3) = about 12. Now how much H2O would be produced if you used 14.0 moles Oxygen and all of the NH3 needed. That will be 14.0 moles O2 x (6 moles...
Sunday, December 11, 2011 at 8:58pm by DrBob222

chem
Very good. Now you use these two values to see which one is the limiting reagent. You do that by converting moles Na to mols H2 and moles H2O to moles H2. The conversion is done by using the coefficients in the balanced equation. Here is how you do the conversion of moles Na ...
Monday, September 21, 2009 at 3:47pm by DrBob222

Chemistry
I have corrected the equation. 2H2O(l) ---> 2H2 (g) + O2 (g) Use PV = nRT to convert 1.2 L of O2 at the conditions listed to moles. Solve for n. Using the coefficients in the balanced equation, convert moles of O2 to moles H2O. Convert moles H2O to grams. g = moles x ...
Tuesday, November 9, 2010 at 11:39pm by DrBob222

chemistry
Your question makes no sense. Perhaps you want to know how many moles H2O were formed. That would be 120/molar mass sugar = moles sugar. moles H2O formed = 11 x moles sugar.
Monday, January 30, 2012 at 8:31pm by DrBob222

Chemistry
First write the balanced reaction. It is CH4 + 2 O2 = CO2 + 2 H2O Each mole of methane makes one mole of CO2. You start out with 100/16 = 6.25 moles of CH4, and end up with the same number of moles of CO2, which has a mass of 44 g per mole. That makes 6.25 * 44 = 275 g To put ...
Thursday, April 28, 2011 at 12:17am by drwls

chem
very good. Note, too, that the coefficients of H2 and H2O are the numbers that go into the fraction of 0.222 x (1 mole H2/2 moles H2O). It's the coefficients of the balanced equation that go in the fraction and the fraction is ALWAYS placed so that the unit we don't ...
Monday, September 21, 2009 at 3:47pm by DrBob222

Chemistry
22.0 mL CO2 = how many moles. That is 22.0 mL x (1 mol/22,400 ml) = ? mol CO2. Now convert that to mole H2O. ?mole CO2 x (2 moles H2O/1 mole CO2) = ? mole CO2 x 2/1 and that x 22,400 mL/mol will convert to mL H2O. There is a shortcut you can use when working will all gases. ...
Friday, December 9, 2011 at 12:56am by DrBob222

chemistry
1. Write the equation and balance it. 2. Convert 130 g 1-butanol to moles. # moles = grams/molar mass. 3. Using the coefficients in the balanced equation, convert moles 1-butanol to moles H2O and moles CO2 (two separate conversions). 4. Now convert moles CO2 and moles H2O to ...
Saturday, November 28, 2009 at 1:01pm by DrBob222

chemisrty
a. mass % H2O = (grams H2O/grams soln)*100 = (100g H2O/1000g)*100 = ? b. M = moles NaCl/L soln = moles NaCl/0.950 = ? moles NaCl = grams NaCl/molar mass c. mols NaCl you have. mols H2O = grams H2O/molar mass total moles = ? XNaCl = moles NaCl/total moles.
Monday, January 16, 2012 at 4:43pm by DrBob222

chemistry
You added at the beginning so you don't add twice. 2H2O ==> 2H2 + O2 You have 0.327 moles O2 and 0.654 moles H2. Convert each to grams H2O to see what you get. 0.327 x (2 moles H2O/1 mole O2) = 0.327 x 2 = 0.654 moles H2O and that x molar mass = 11.8 g H2O OR use H2...
Thursday, December 8, 2011 at 10:42am by DrBob222

chemistry
Psoln = XH2O*PoH2O 15.0 torr = XH2O*17.5 torr Solve for XH2O which gives you the mole fraction that H2O must be. I'll call that ?? [molesH2O/(moles H2O + moles sucrose)]=?? moles H2O = grams water/molar mass H2O, substitute this into the equation immediately above this (...
Thursday, December 2, 2010 at 12:08am by DrBob222

general chemistry
CnHm + O2 → CO2 + H2O 4.04g of CO2*(1 mole of CO2/44.01g of CO2)=moles of CO2=0.0913g of CO2 1 mole of CO2=1 mole C, moles of CO2=moles of C 1.24 g of H20 *(1mole of H20/18 g of H20)=moles of H20=0.689 1 mole of H20=2 moles of H 2*moles of H20= moles of H=0.1376 ...
Wednesday, February 6, 2013 at 3:44am by Devron

chemistry
KI dissociates in water to produce KI ==> K^+ + I^- Moles KI = grams KI/molar mass KI. Since there are two ions per molecule of KI, the total number of moles will be just twice the moles KI. Moles of K^+ and moles I^- will equal moles KI.
Monday, November 23, 2009 at 11:09am by DrBob222

chemistry
HCl + NaOH ==> NaCl + H2O moles HCl = M x L = ?? moles NaOH = M x L = same number. moles H2O produced = same number. grams H2O = moles x molar mass. Look up density of water at the temperature of the reaction and mass = volume x density. You know mass and density, solve...
Friday, August 12, 2011 at 9:48pm by DrBob222

chemistry
First, it isn't centigrade any longer but celsius. Second, you must look up the vapor pressure of H2O at 50 C. You can get that on the web OR look in your text or notes. I think ALL beginning chemistry text have a table of vapor pressure versus temperature. Convert 23.7g ...
Thursday, September 22, 2011 at 6:34pm by DrBob222

chemistry
Psoln = XH2O*PoH2O Look up Po for H2O at 75, substitute 277 torr for Psoln and solve for XH2O. Then XH2O = (moles H2O)/(moles H2O + mols Unk). Solve for moles Unknown Then moles = grams/molar mass and solve for molar mass. Probably you can pick it up here and obtain the % by ...
Sunday, December 5, 2010 at 5:07pm by DrBob222

Chemistry
(0.3250)(0.09877g) = 0.03210 g Cu - - - -> also moles of CuSO4 0.03210 g Cu / 63.55 g/mol = 5.05x10^-4 moles Cu - - - - - - - - - - - - - - - - - - - - 1 mole BaSO4 = 233.4 g 0.11666g BaSO4 / 233.4 g/mole = 5.000x10^-4 moles BaSO4 (confirms mol Cu = moles SO4 as ...
Thursday, June 11, 2009 at 2:55pm by GK

Biology
The two hydrogens are bent at an angle, so the end of an H2O molecule has an O on it, which is net negatively charged, which makes the molecule polar.
Tuesday, October 7, 2008 at 10:01pm by bobpursley

chemistry
moles H2O = 0.2113/molar mass H2O. Solve for moles. molality = moles H2O/kg solvent. Solve for molality. delta T = Kf*m solve for Kf.
Monday, June 14, 2010 at 7:14pm by DrBob222

chemistry
Write the two balanced equations and see. 2H2 + O2 ==> 2H2O 3H2 + N2 ==> 2NH3. Use a convenient number of moles H2 to start (say 2 moles but you can pick any number as long as you use the same number for both equations). How much water will we get (in moles). 2 ...
Sunday, April 11, 2010 at 4:06pm by DrBob222

chem
Okay, this is what I think... it seems to be too easy. So the reaction produces 6 moles of CO2 and 6 moles of H2O, that mean they have a ratio of 1 to 1. In other word, when you have 174 moles of H2O, then you'll also have 174 moles of CO2... so there isn't really any ...
Friday, May 16, 2008 at 3:25pm by Jake1214

Chemistry
H2 + O2 -> H2O balancing this, 2H2 + O2 -> 2H2O then we find the limiting reactant. To determine the limiting reactant, we get the moles of product from the given moles of reactant. Whichever yield less number of moles of product is the limiting reactant. thus, 4...
Wednesday, May 16, 2012 at 1:56am by Jai

chemistry
2H2 + O2 ==> 2H2O First determine the limiting reagent. (When BOTH reactants are given you know it is a limiting reagent problem.) 5 L H2 x (2 moles H2O/2 moles H2) = 5 L x (2/2) = 5 L H2O. 2 L O2 x (2 moles H2O/1 mole O2) = 4 L H2O. Both answers can be right; the ...
Thursday, April 15, 2010 at 6:02pm by DrBob222

chamistry
33.6% w/w HCl means 33.6 g HCl/100 g solution which means 33.6 g HCl/(33.6g HCl + 66.4 g H2O). moles HCl = 33.6/molar mass HCl. moles H2O = 66.4/molar mass H2O. XHCl = moles HCl/total moles. XH2O = moles H2O/total moles.
Wednesday, February 23, 2011 at 10:15pm by DrBob222

chemestry
Molality is found by dividing the moles of solute (K2CrO4) by the Kg of of solvent (H2O). So first convert g K2CrO4 to moles. Molecular weight of K2CrO4= 194.19 So 350g/194.19g= 1.8024 moles. Then 1.8024 moles K2CrO4/ 2.4 kg H2O= .751 moles/ kg Hope that helps!
Thursday, April 25, 2013 at 12:01am by Audre

Chemistry 11th
2NH4NO3 ==> 2N2 + 4H2O + O2 STP means standard temperature and pressure. Convert 300 g NH4NO3 to moles. moles = grams/molar mass. Using the coefficients in the balanced equation, convert moles NH4NO3 to moles N2, then to moles H2O, then to moles O2. Finally, convert ...
Tuesday, June 1, 2010 at 9:40pm by DrBob222

chemistry
GIVEN THE FOLLOWING CHEMICAL EQUATION: 3 +Cu +8 HNO3 = 3 Cu(NO3)2 + 2 NO + 4 H2O. 1).HOW MANY MOLES OF Cu(NO3)2 ARE PRODUCED WHEN 3 MOLES OF Cu REACT? 2).HOW MANY MOLES OF Cu MUST REACT TO PRODUCE 4 MOLES OF NO? 3). If 4 moles of NO ARE PRODUCED HOW MANY MOLES OF h2o are also ...
Monday, July 14, 2008 at 6:58pm by Persia

college chemistry
No. The molar mass of BaCl2.2H2O is Ba = 137.327 Cl = 35.453 x 2 = 70.9054 H2O = 18.015 x 2 = 36.0306 total = 244.263 for BaCl2.2H2O. 1.2/244.263 = 0.00491 moles BaCl2.2H2O moles H2O evolved = 0.00491 x (2 moles H2O/1 mole BaCl2.2H2O) = 0.00491 x 2 = 0.00983 moles H2O. grams ...
Tuesday, September 15, 2009 at 9:37pm by DrBob222

Chemistry
Cr(NO3)2.xH2O. You want to determine the value of x. Take a 100 g sample which will give you 40.5 g H2O and 59.5 g Cr(NO3)2 Convert to moles. 40.5/molar mass H2O = ?? 59.5/molar mass Cr(NO3)2 Now find the ratio of H2O molecules to 1 molecule Cr(NO3)2. Check your numbers; this ...
Thursday, April 1, 2010 at 8:12pm by DrBob222

Chemistry
From what? grams or percents? If either, convert to grams. Divide g cmpd/molar mass = moles compd. Divide g H2O/molar mass = moles H2O. Then find the ratio of number of moles H2O per 1 mole of the compd.
Saturday, April 23, 2011 at 1:57pm by DrBob222

Chemistry
This is a limiting reagent problem. Convert 995 g CH4 to moles. Convert 2510 g H2O to moles. Using the coefficients in the balanced equation, convert moles CH4 to moles H2. Do the same and convert moles H2O to moles H2. Probably the number of moles will not agree which means ...
Thursday, October 7, 2010 at 9:20pm by DrBob222

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