The number of oxygen atoms in 4.4 g of CO2 is

Question

The number of oxygen atoms in 4.4 g of CO2 is (A) 1.2 × 1023 (B) 6 × 1022 (C)  6 × 1023 (D) 12 × 1023 molecules

Tardigrade Admin · Accepted Answer

(a) 1 mole of CO2 = 44 g of CO2 = 6.023 × 1023 molecules ∴ 4.4 g of CO2 = 0.1 mole of CO2 = 6.023 × 0.1 × 1023 molecules = 6.023 × 1022 molecules = 6.023 × 1022 molecules of O2 = 2 × 6.023 × 1022 atoms of O2 ≈ 1.2 × 1023 atoms of O2

Q. The number of oxygen atoms in 4.4 g of $C O_{2}$ is

$1.2 \times 1 0^{23}$

$6 \times 1 0^{22}$

$6 \times 1 0^{23}$

$12 \times 1 0^{23} m o l ec u l es$

Q. The number of oxygen atoms in 4.4 g of CO2​ is

1.2×1023

6×1022

6×1023

12×1023molecules

(a) 1 mole of CO2​=44gofCO2​ =6.023×1023molecules ∴4.4gofCO2​=0.1moleofCO2​ =6.023×0.1×1023molecules =6.023×1022molecules =6.023×1022moleculesofO2​ =2×6.023×1022atomsofO2​ ≈1.2×1023atomsofO2​

Q. The number of oxygen atoms in 4.4 g of $C O_{2}$ is

$1.2 \times 1 0^{23}$

$6 \times 1 0^{22}$

$6 \times 1 0^{23}$

$12 \times 1 0^{23} m o l ec u l es$