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April 18, 2014

Homework Help: chemistry

Posted by John on Thursday, January 5, 2012 at 2:41am.

I am a freshman in college, and am taking a placement test soon, but haven't seen chemistry since 10th grade.

I'd appreciate any help I can get from anyone here to help me solve this problem:

Hydrogen and sulfur chemically combine to form the gas hydrogen sulfide, according to the reaction: H2 (g) + S(s) → H2S(g). How many liters of hydrogen are required to form 7.4 L of hydrogen sulfide (at STP: 273 K, 101.3 kPa)?

I know that it involves stoichiometry, and the Ideal Gas Law, but am kind of confused on how to start it.

Thank you in advance!

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