The oxide of a metal contains 40% of oxy...

The oxide of a metal contains 40% of oxygen. The valency of metal is 2. What is the atomic weight of metal?

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The correct Answer is:

(a)

Metal oxide = 40% oxygen + 60% metal
100g of metal oxide = 40g oxygen + 60g metal
8g of oxygen combines with = `60xx8/40`= 12 g of metal
`:.`Equivalent weight of metal = 12
`:.`Atomic weight of metal =Equivalent weight `xx` valency

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