Chemistry
posted by Soba .
N2 (g) + 3 CL2 (g) > 2 NCL3 (g)
delta H = + 230 kj

a) What mass of N2 would absorb 96.5 kj of heat as it reacts?
b) What volume of Cl2 at STP would be required to react with the N2 in part (a)?

I will be happy to critique your thinking.

I don't know how to find mass with the enthalpy formula.

Just rephrase the question.
If 230 kJ is delta H for 1 mol of N2, then how many mols would account for96.5 kJ 
Thanks.