# 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?

The answers post by the user, for information only, FunQA.com does not guarantee the right.

More Questions and Answers:
• A 10.0mL sample of NaCl solution has a mass of 10.416g. When the solution is evaporated to dryness,the solid?
• Ascorbic acid is vitamin C, C6H8O6,(176g/mol) is a diprotic acid where ka1=6.8*10^-5 and ka2=2.7*10^-12.?
• Unit Analysis?
• Redox Reactions?
• What're da equations for alkanes and alkenes tests.?
• Does fart and other toxic gases contribute to the depletion of the ozone?
• A sample of gas at 38.0 degrees C occupies a volume of 2.97 L and exerts a pressure of 3.14 atm. The ga...
• Nernst Eq. - Sign Of Ecell Changes For Various Cell Changes?
• Chemistry Help!!!!!111?