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Mass of gas

  • Thread starter kasse
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[SOLVED] Mass of gas

Homework Statement



What mass of He gas occupies 8.5 L at 273 K and 1 atm?

Homework Equations



PV = nRT

The Attempt at a Solution



n = PV/RT = (101 kPa * 8.5 L)/(8.3145 * 273 K) = 2.64E-3 mol --> 10.6 g

My solutions manual says 1.52 g. Am I right or wrong?
 

Answers and Replies

  • #2
Dick
Science Advisor
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2.64E-3 mole? Really? I seem to remember a mole of gas at STP is 22.4 liters. What does a mole of helium mass? The book is right.
 

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