When 3.0 g of carbon is burnt in 8.00 g oxygen, 11.00 g of carbon dioxide is produced. What mass of carbon dioxide will be formed when 3.00 g of carbon is burnt in 50.00 g of oxygen? Which law of chemical combination will govern your answer?

Explanation

Our answer will be governed by the law of constant proportions. Now, since carbon and oxygen combine in the fixed proportion of `3 : 8` by mass to produce 11 g of carbon dioxide, therefore, the extra mass of carbon dioxide (11g) will be obtained even if we burn 3 g of carbon in 50 g of oxygen. The extra oxygen (`50 - 8 = 42 g` oxygen) will remains unreacted.