Chemical reaction involved for the above reaction :-
C6H10O5 +602 --------> 6CO2 + 5H2O
Molar mass of cellulose(C6 H10O6)= 162 g/mol
Molar mass of CO2 = 44.01 (given)
According to stoichieometry of the reaction:-
162 g cellulose producess = 6×44.01 grams of CO2
1g of cellulose producess = 6× 44.01/162
= 264.06/162
= 1.63 grams of CO2