If the atomic mass & valency of the element, M is 40 and 2 respectively Determine the molar mass of the metal oxide (with Metal Sulphide (1) metal bicarbonate
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Explanation:
An oxide of a metal (M) contains 40 % by mass of oxygen.
100 g of the oxide will contain 60 g of metal and 40 g of oxygen.
Metal (M) has an atomic mass of 24.
40 g of metal corresponds to
24
60
=2.5mol
Oxygen has an atomic mass of 16.
60 g of oxygen corresponds to
16
40
=2.5mol
Hence, the ratio of the number of moles of metal to oxygen is 1:1.
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