Question

3 g of carbon on burning in 8 g oxygen produces 11 g of carbon dioxide. What mass of carbon dioxide will be formed when 3 g of carbon is burnt in 50 g of oxygen?

Answer 1

Atomic weight of Carbon = 6
Atomic weight of Oxygen = 16

3 gram of Carbon burns with 8 grams of Oxygen to produce 11 gram of Carbon Dioxide
3 grams of Carbon will burn with 50 gram of Oxygen to produce 11 grams of Carbon Dioxide and rest of 42 grams of Oxygen will be unutilised

Answer 2

when 3.00 g of carbon is burnt in 50.00g of oxygen then the mass of carbon dioxide formed =53.00g

according to the law of conservation of mass the total mass before and after the reaction remains same.

3.00g +50.00g =53.00g