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

Question

The oxide of a metal contains 40 % of oxygen. The valency of metal is 2 . What is the atomic weight of metal? (A) 24 (B) 13 (C) 40 (D) 36

Tardigrade Admin · Accepted Answer

∵ 40 g of oxygen is combined with =60 g of metal ∴ 8 g of oxygen will be combined with =(60 × 8/40) =12 g of metal ∴ Equivalent weight of metal =12 Now, Atomic weight = Equivalent weight × valency =12 × 2=24

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

24

13

40

36

$∵ 40 g$ of oxygen is combined with $= 60 g$ of metal

$∴ 8 g$ of oxygen will be combined with $= \frac{60 \times 8}{40}$

$= 12 g$ of metal

$∴$ Equivalent weight of metal $= 12$

Now, Atomic weight $=$ Equivalent weight $\times$ valency

$= 12 \times 2 = 24$

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

24

13

40

36

∵40g of oxygen is combined with =60g of metal ∴8g of oxygen will be combined with =4060×8​ =12g of metal ∴ Equivalent weight of metal =12 Now, Atomic weight = Equivalent weight × valency =12×2=24

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

$∵ 40 g$ of oxygen is combined with $= 60 g$ of metal

$∴ 8 g$ of oxygen will be combined with $= \frac{60 \times 8}{40}$

$= 12 g$ of metal

$∴$ Equivalent weight of metal $= 12$

Now, Atomic weight $=$ Equivalent weight $\times$ valency

$= 12 \times 2 = 24$