at STP what is the mass of 22.4L of hydrogen gas.
how would you do this problem?
2007-06-06 06:07:49 · 5 answers · asked by ? 2 in Science & Mathematics ➔ Chemistry
all gases at STP have a molar volume of 22.4 L. Since it tells you the gas is already 22.4 L you should know that there is only 1 mol of gas there. You then take the molar mass of hydrogen and multiply it times 2 (Because hydrogen is a diatomic gas). So the answer is simply 2g.
2007-06-06 06:18:00 · answer #1 · answered by T Hobbes 2 · 0⤊ 0⤋
At STP 22.4 L of any gas is equal to a mole of that gas. Since hydrogen exists as H2 in its free state, you have a mole of H2 molecules. The mass of H is 1.00, so the mass of 1 mol of H2 is 2.00 g/mol
2007-06-06 13:15:07 · answer #2 · answered by physandchemteach 7 · 0⤊ 0⤋
22.4L of any gas at STP contain one mole of that gas. And, one mole of any element/compound contains the atomic/molecular weight of that substance in grams. So, one mole of hydrogen will weigh 2grams.
2007-06-06 13:18:33 · answer #3 · answered by sloth 3 · 0⤊ 0⤋
2 g, it follows from Avogadro's Law.
2007-06-06 14:05:32 · answer #4 · answered by ag_iitkgp 7 · 0⤊ 0⤋
Just use the steps here
http://online.redwoods.cc.ca.us/instruct/Milo/5/sld030.htm
2007-06-06 13:11:55 · answer #5 · answered by deadwhisperer 3 · 0⤊ 0⤋