Answer to Question #208929 in Physical Chemistry for biken maharjan

Question

what is mass of 5 mole of ammonia?calculate the number of NH3 molecules, nitrogen atoms and hydrogen atoms in it

Answer 1

Molar mass of NH₃ = 17.031

5 moles of NH₃ = 17.031 × 5

= 85.155g

1 mole = 6.022×10²³

Hence, NH₃ has 6.022 × 10²³ molecules

NH₃ has 1N and 3H

Therefore, number of atoms for N = 1/4 × 6.022×10²³

= 1.5055×10²³atoms

Number of atoms for H = 3/4 × 6.022×10²³

= 4.5165 × 10²³ atoms