How many grams of dichloromethane result from reaction of 2.62 kg of methane if the yield is 43.5 %?

Question

CH4+2Cl -> CH2Cl2+2HCl

Answer 1

Here is a worked example of a simple stoichiometry problem. You will find the theoretical yield, then multiply that by 0.435.
http://www.jiskha.com/science/chemistry/stoichiometry.html