Question

When 5g of calcium is burnt in 2g of oxygen, then 7g of calcium oxide is produced. What mass of calcium oxide will be produced when 5g of calcium is burnt in 20g of oxygen? Which law of chemical combination will govern your answer?

Answer 1

Answer:

When 5g of calcium is burnt in 2g of oxygen ,we get 7g of calcium oxide From this we understand that, calcium and oxygen combine in the ratio 5:2. Hence when 5g of calcium is burnt in 20g of oxygen,it will produce only 7g of calcium oxide. This is in accordance with law of constant proportions.

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