Question

The chemical reaction for making benzene from carbon and hydrogen is:
6C+3H2>C6H6
If 72 grams of carbon and 6 grams of hydrogen react completly, how many benzene will be formed? Explain answer?

Answer 1

First find moles of each compound
Moles= given weight/molecular weight
C=72/12=6.
H=6/2=3.
Now from the equation it is obvious that 6 moles of carbon react with 3 moles of hydrogen to give one mole of benzene.
So you have one mole of benzene which weighs 1*78=78 g.