& A metal has its valency is 2 and its oxide
molar mass is no. Then the metal is.
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100 g of metal oxide will contain 40 g oxygen and 60 g metal.
Number of moles of oxygen
16g/mol
40g
=2.5mol
The valency of metal is 2. The formula of metal oxide will be MO.
Hence, number of moles of metal = number of moles of oxygen =2.5mol
The atomic weight of the metal is-
2.5
60
=24g/mol.
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