Question

4.8 g of magnesium burned completely in oxygen to give 8 g of magnesium oxide.

Find the empirical formula of the oxide.

Answer 1

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Answer 2

Explanation:

The chemical equation can be written as:

2Mg+O

2

→2MgO

48 g of Mg reacts with 32 g of O

2

.

Thus, 4.8 g of Mg reacts with 3.2 g of O

2

.

Now, 32 g of O

2

forms = 80 g of MgO.

3.2 g of O

2

produces =

32

80

×3.2 = 8 g of MgO.