Question

When 5.0 g of magnesium is burnt in 4.00 g of oxygen, 9.00 g of magnesium oxide is
produced. What mass of magnesium oxide will be formed when 5.0 g magnesium is burnt in 7.0 g of
oxygen? Which law of chemical combination will govern your answer?

Answer 1

Answer:

Thus, when 3.00 g of magnesium is burnt in 5.00 g of oxygen, 5.00 g of magnesium oxide will be formed and the remaining oxygen will be left unused. It is governed by law of definite proportion. It states that in a chemical substance, the elements are always present in definite proportions by mass.

Answer 2

Answer:

State the law.

It means magnesium and oxygen are combined in the ratio of 3 : 2 to form magnesium oxide. Thus, when 3.00 g of magnesium is burnt in 5.00 g of oxygen, 5.00 g of magnesium oxide will be formed and the remaining oxygen will be left unused. It is governed by law of definite proportion.

Explanation:

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