Question

calculate the number of molecules in 44g of NO2 gas​

Answer 1

Answer:

44 gram of NO2 have 5.7×10^23 no. of molecules

Answer 2

Answer:

5.76 × $10^{23}$

Explanation:

GIVEN: 44g of NO₂ gas

To calculate the Molar mass {M} of NO₂ gas:

Atomic mass of nitrogen = 14 u

Atomic mass of oxygen = 16 u ⇒ Since O₂ molecule is there,

                                           (16 × 2) = 32 u

NOW, Molar mass(M) = 14 u + 32 u ⇒ 46 u

Number of molecules = (Given mass ÷ Molar mass) × Avagadro number

                                 N = $\frac{m}{M}$ × Nₐ

Number of molecules = $\frac{44}{46}$ × 6.022 × $10^{23}$  

                                   ⇒ 5.76 × $10^{23}$