i have the number of moles i just don't know what to do next...
A volatile compound contains carbon, hydrogen and chlorine. A 256mL flask at 372.15 kelvin and 748 torr contains 1.097g of the compound. Calculate the molar mass of the compound. Use the ideal gas law to find moles first.
the number of moles =.00825 mol what do i do?
2006-11-11 07:42:53 · 5 answers · asked by jdaman12345 2 in Science & Mathematics ➔ Chemistry
PV = nRT
since n = g/MM
MM = gRT/PV
so...
MM = 1.097g * (62.3637 L·Torr/Kmol) * 372.15K / 743 torr * 0.256L
MM = 133.85 g/mol
2006-11-11 08:13:13 · answer #1 · answered by titanium007 4 · 0⤊ 0⤋
If you've gotten the number of moles correctly, you're give the mass. So, molar mass has units of g/mol. Just divide the mass of the sample by the number of mols that you calculated, and you've got the molar mass of the compound...
2006-11-11 08:07:56 · answer #2 · answered by hcbiochem 7 · 0⤊ 0⤋
Use PV=nRT
Pressure- convert torres to atmospheres
Volume= convert ml to l
R= .08206
T= 372.15 K
Plug these in. solve for n. n gives number of moles.
grams x molor mass= moles. Since you have grams and moles solve for molor mass.
2006-11-11 08:16:03 · answer #3 · answered by mo 1 · 0⤊ 0⤋
I need to calculate the molar mass of methionine. I am completely lost nad need step by step on how to do this, please.
2014-02-21 03:51:12 · answer #4 · answered by Cindy Earnest 1 · 0⤊ 0⤋
http://www.newton.dep.anl.gov/askasci/chem98.htm
2006-11-11 07:46:47 · answer #5 · answered by Anonymous · 0⤊ 0⤋