Question

What will be the weight of CO having the same number of oxygen atoms as present in 22 g of $CO_{2}$?

• A. 28 g
• B. 22 g
• C. 44 g
• D. 72 g

Answer 1

Answer: (A)

28 g

Answer 2

(1) : No. of O atoms in $CO_{2} = 2$

Molar mass of $CO_{2} = 44g$

$44g \equiv 1mol \Rightarrow 22g \equiv 0.5mol$

1 Mole of $CO_{2}$contains $= 2 \times 6.023 \times 10^{23}O$atoms

$0.5$mole of $CO_{2} = 6.023 \times 10^{23}O$atoms

1 mole of CO = $6.023 \times 10^{23}O$atoms

Mass of 1 mole of

CO =$12 + 16 = 28g$