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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 .

Answers

Answered by GAMER5050
2

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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Answered by nehaparveen75
0

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.

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