1.

Which one of the following oxides dissolves in water ?

Answer»

CuO
`Al_(2)O_(3)`
`Fe_(2)O_(3)`
`Na_(2)O`

Solution :The atoms and MOLECULES in gases are much more spread out than in solids or liquids . They vibrate and MOVE freely at HIGH speeds . A gas will fill any container , but if the container is not sealed , the gas will escape . Gas can be compressed much more easily than a liquid or solid.


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