Preparation of alkenes

Question

A mixture containing equal moles of C2H4and C3H8contains 3.6 grams of hydrogen. What is the mass ofcarbon in the mixture?

Answer 1

Preparation of alkenes
A mixture containing equal moles of C2H4and C3H8contains 3.6 grams of hydrogen

 

If the molar amounts are equal, then they are in a ratio of 1/1.

1C2H4 + 1C3H8 has 5 moles of C and 12 moles of H

3.6 g H x (1 mole H/1.01 g H) x (5 mole C/12 mole H) x (12.01 g C/ mole C) = 17.8 g C

 

Caveat: I haven't done any organic chem in 45 years...