a gas was found to have a density of 1.85g/l at 780 torr and 0degrees C. What is the molarmass of the gas?

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a gas was found to have a density of 1.85g/l at 780 torr and 0degrees C. What is the molarmass of the gas?

a gas was found to have a density of 1.85g/l at 780 torr and 0degrees C. What is the molar mass of the gas? thanks!

2007-12-01 15:12:01 · 1 answers · asked by Anonymous in Science & Mathematics ➔ Chemistry

1 answers

Use the ideal gas equation:

PV = nRT

Solve for n: n = PV/RT

Plug in the numbers in proper units!

780mmHg/760mmHg/atm = 1.026atm

n = 1.026atm x 1.00L/0.08206Latm/molK x 273K = 0.0458mole

This tells you how many moles 1.85g is, so:

if 1.85g = 0.0458 mole:

1.85g/0.0458mole = 40.4g/mole

2007-12-01 15:50:24 · answer #1 · answered by Flying Dragon 7 · 0⤊ 0⤋