[steam03]

At STP, 1atm and 0C, I am required to find the volume of gas. Using Ideal gas law pV = nRT where p = 101.325kPa, R = constant, T = 273K, n = ?, V = ??

I am given a list of compounds and their corresponding mol% that the entire gas contains.
I also know the mass of the entire "piece" of gas to be 0.71kg.

But how can I use these info to obtain the total number of moles in this gas? I can research up the molar mass of each element, hence calculate the molecular mass of each compound in g/mol. This doesn't seem to do me any good in finding the total mol. I cannot just simply add up all the molecular mass since there are unknown number of molecules of each compound in this gas.

I'm missing some knowledge. Please advise what I can do.
Thanks in advnace

NOTE: There are 8 compounds in total in this gas.

[Borek]

List all information you have.

[steam03]

List all information you have.

Originally, this is a coal gasification problem. assume, input: 1 coal feed (1kg of coal), output: 1 coal residue and 1 gas.


The composition of product gas in mole % is as follow:
H2         CO2       C2H6      H2S      N2      CH4      CO      Total
30.99     34.61      0.42      0.98      5.59    17.57   9.84      100.0

Mass of gas is 0.7106kg.
STP at 1atm, 0C
Find amount of gas in volume.