Question

3) Which of following has minimum number of molecule. (A) 20 g NO2 (C) 8 g 02 (B) 2 g H2 (D) 7 g Nz ​

Answer 1

Answer:

both (C) 8g O₂ and (D) 7g N₂have minimum number of molecule.

Explanation:

given

Molecular mass of

NO₂-46

O₂   -32

H₂   -2

N₂   -28

formula for number of molecule is=  $\frac{Given mass}{Molar Mass}$*(6.023*10²³)

solution

(A)-20/46(6.023* 10²³)= 2.6186 * 10²³

(C)-8/32(6.023* 10²³)  = 1.5057 * 10²³

(B)-2/2(6.023* 10²³)  = 6.023 * 10²³

(D)-7/28(6.023* 10²³) = 1.5057 * 10²³