Back to Practice
STANDARDChemistry-Mole Concept

STANDARD Chemistry Molar Mass MCQ Question

Type: MCQ-numerical-Medium

How many atoms are there in 4.25 g of NH₃?

A

6 × 10²³

B

1.5 × 10²³

C

3.4 × 10²³

D

1 × 10²³

Correct Answer

Option A

Detailed Explanation

The no. of molecules = (Given mass / Molar mass) × Nₐ = (4.25 / 17) × 6.023 × 10²³ = 1.5057 × 10²³. One molecule of NH₃ has 4 atoms. Hence, no. of atoms = 1.5057 × 10²³ × 4 = 6.023 × 10²³

Found an issue with this question?

Related Questions

Explore More Questions

All Chemistry Questions