February 22, 2017

Homework Help: Chemistry

Posted by Lisa on Tuesday, April 20, 2010 at 4:36am.

If 45.3 mL of liquid CS2 and 7.62 L of gaseous O2 measured at STP are reacted stoichiometrically according to the balanced equation, how many milliliters of liquid CS2 remain?

CS2(l) + 3O2(g) -> CO2(g) + 2SO2(g)

Molar Mass (g/mol)
CS2 76.143
O2 31.998

Density (g/mL)
CS2 1.26

The correct answer is 38.47437
I don't understand how to set up the problem. I believe I'm supposed to use the Ideal Gas Law at some point. But how? Can someone please give me a step by step explanation on how to solve a problem like this?

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