Asked by Anonymous
A compound with a percent composition by mass of 87.5% N and 12.5% H was recently discovered. What is the number of moles of Hydrogen in this compound? Atomic Mass: N = 14.01, H = 1.008
Answers
Answered by
DrBob222
Actually, you can't find the number of mols until you have a mass; however, the data does provide a way to find the empirical formula.
Take a 100g sample.
That's 87.5 g N and 12.5g H.
mols N = 87.5/14.01 = about 6.25
mols H = 12.5/1.008 = about 12.5
The ratio is NH2 for the empirical formula. There are two mols hydrogen for every mole of N.
Take a 100g sample.
That's 87.5 g N and 12.5g H.
mols N = 87.5/14.01 = about 6.25
mols H = 12.5/1.008 = about 12.5
The ratio is NH2 for the empirical formula. There are two mols hydrogen for every mole of N.
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