The mass of 322 mL of hydrogen gas at 4.0 atm and –73°C is 1.21 grams. What is the density of hydrogen...?

The mass of 322 mL of hydrogen gas at 4.0 atm and –73°C is 1.21 grams. What is the density of hydrogen gas at STP?

Answer:
At STP p = 1atm and T = 273 K
d = M p / RT
M is the molar mass.
Molar mass of H2 = 2 g/mol
d = 2 x 1 / 0.0821 x 273 = 0.0892 g/L

Note : 0.0821 x 273 = 22.4 ( molar volume )
At STP d = molar mass / molar volume
Wow...

Are you studying chemistry seriously and profoundly?

Are you referring to oxyhydrogen or hydrogen cyanide gas here buddy?

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