Question

Ethylene gas (C2H2) can be formed from the reaction of calcium carbide (CaC2) with water. What is the reaction rate if 14.2 grams of ethylene gas are produced over 4.00 seconds? The units are mol/s.

Answer 1

I don't see any way to calculate concentration. You have grams and you can get mols, but mols/L = ?
rate = d(C2H2)/time.