Doing practice test questions for an up coming test. And I can't figure this out.

I just need the equation on both sides.

3.81x10(4)g of acetylene(C2H2) are produced when 5.19x104g of methane(CH4) are treated in an electric arc in the commercial preparation of acetylene. H2 is also produced. Write a balanced reaction equation and find the % yield.

So is it CH4 + H2 = C2H2 + H2??

I am stuck on this one.

If someone can help me out please, thanks.

Joanne