calculate the number of Aluminium atoms present in 0.120 gram of Aluminium oxide
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Calculate the number of Aluminium ions present in 0.051 gram of Aluminium oxide
1 Calculate the number of aluminium ions present in 0.051g of aluminium oxide(Al2O3).
2 Molecular weight of Al2O3 = 102 g.
102 g of Al2O3 contains 6.022X1023 3 molecules.
4 0.051g of Al2O3 contain X number of molecules.
5 X = 0.051 X 6.022X1023 /102 = 0.003 X 1020
X = 3 X 1020
6 1 molecule of Al2O3 contains – 2 Al+3ions.
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