MHT CET202620 April 2026Evening ShiftChemistrySome Basic Concepts of ChemistryActual

What is the number of molecules in 2.125 g of ammonia?

Options

A6.022 10²³
B3.011 10²³
C1.505 10²²
D7.527 10²²

Correct answer

D. 7.527 10²²

Step-by-step solution

Molar mass of ammonia ( NH₃ ) = 14 + 3 = 17 g/mol Number of moles of ammonia = 2.125 17 = 0.125 mol Number of molecules = 0.125 6.022 10²³ = 7.527 10²² Answer: 7.527 10²²

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