Question

Calculate the number of aluminium ions present in 0.051 g of aluminium oxide. (Hint: The mass of an ion is the same as that of an atom of the same element. Atomic mass of Al = 27 u)​

Answer 1

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Calculate the number of aluminium ions present in 0.051 g of aluminium oxide. (Hint: The mass of an ion is the same as that of an atom of the same element. Atomic mass of Al = 27 u)

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Molar mass of aluminium oxide Al203

= (2 x 27) + (3 x 16)

= 54 + 48 = 102 g.

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Answer 2

Answer:

The mass of an ion is the same as that of an atom of the same element. Atomic mass of Al = 27 u) . The number of aluminium ions (Al3+) present in one molecule of aluminium oxide is 2.