Given the reactions below: CH4+O2→HCHO+H2O CH4+O2→CO2+H2O Which of the following expressions gives the correct H balance for an equimolar feed of CH4(A) and O2(B) at a flow rate of 100 mol/s? Let...

Given the reactions below:

CH4+O2→HCHO+H2O

CH4+O2→CO2+H2O

Which of the following expressions gives the correct H balance for an equimolar feed of CH4(A) and O2(B) at a flow rate of 100 mol/s?

Let C=HCHO, D=H2O, E=CO2, and n= number of moles.

a.50=2nC+2nD−4nA

b.200=4nA+2nC+2nD

c.50=4nA+nC+2nD

d.200=2nA+nC+3nD