Question

The number of atoms in 1.7 g of NH3 is (1) 1.7 NA (2) 1.2 NA (3) 0.4 NA (4) 0.6 NA​

Answer 1

Let us consider the problem.

For, moles of NH3=171.7=0.1

Let the Neutrons in 1 molecules of NH3=7+3×0=7

Hence,

Number of Neurons =0.1×NA×7

The correct answer is 0.7NA

Answer 2

Answer: Option 1st 1.7 Na Is Correct Option