Question

Calculate the number of moles of CO2(a) produced when 0.250 mol CH2(g) is burned in the presence of 0.400 mol O2@). CH4(9) + 2 O2(g) + CO2(g) + 2 H2O(g)

Answer 1

Balanced chemical equation is:
CH4 + 2 O2 ---> CO2 + 2 H2O


1 mol of CH4 reacts with 2 mol of O2
for 0.25 mol of CH4, 0.5 mol of O2 is required
But we have 0.4 mol of O2

so, O2 is limiting reagent
we will use O2 in further calculation

According to balanced equation
mol of CO2 formed = (1/2)* moles of O2
= (1/2)*0.4
= 0.2 mol

Answer: 0.200 mol