Question
Find the number of molecules present in 70 g dinitrogen.
MHT CET
Chemistry
Some Basic Concepts of Chemistry
2026
MHT CET 2026 (18 April Shift 2)
MHT CET Chemistry Question (2026) — Solution
Options
- A. 1.5055 10^ 24
- B. 1.5055 10^ 23
- C. 3.011 10^ 24
- D. 3.011 10^ 23
Answer
A. 1.5055 10^ 24
Step-by-step solution
Molar mass of dinitrogen (N_2) is 28 g mol ^ -1 Number of moles of N_2 = 70 28 = 2.5 mol Number of molecules = n N_A Number of molecules = 2.5 6.022 10^ 23 = 1.5055 10^ 24 Answer: 1.5055 10^ 24
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