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A metallic oxide (M_2 O_3) contains 40% oxygen. Find out atomic weight of M and molecular weight of M_2 O_3 .
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Answer:
CHEMISTRY
The oxide of a metal contains 40% of oxygen. The valency of metal is 2. What is the atomic weight of the metal?
A .
24
B .
12
C .
40
D .
36
October 15, 2019Sahith Lunagaria
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ANSWER
100 g of metal oxide will contain 40 g oxygen and 60 g metal.
Number of moles of oxygen 16g/mol40g=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-
2.560=24g/mol.
Explanation:
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Explanation:
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-
60/2.5=24g/mol.