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BECE Science 2013 Paper

Question : 31

Total: 40

Solution:

Concept:

The chemical formula of water shows the number of atoms of each element present in one molecule.

Explanation:

Water is

\mathrm{H}_2\mathrm{O}

This means each water molecule contains 2 hydrogen atoms and 1 oxygen atom.

Therefore, the ratio of hydrogen to oxygen by number of atoms is

2:1

The correct option is C.

Answer:

2:1

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