Question

3. The number of Al3+ ions in 0.051 g of aluminium
oxide are (Atomic mass of Al = 27 u, O = 16 u)
(a) 6.022 x 1020
(b) 3.3 X 1020
(c) 2.2 x 1020
(d) 6.022 x 1023
please tell it's urgent​

Answer 1

Atomic mass of Al = 27 u) . The number of aluminium ions (Al3+) present in one molecule of aluminium oxide is 2.

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