^{24}

**atoms**?

A 1 mol of nitrogen gas

B 1 mol of ammonia

C 1 mol of water

D 1 mol of argon

Many of my students choose the wrong answer in the current topical test.

1 mol of nitrogen gas consists of 1 x 6.02 x 10

^{23}

**molecules.**

Number of

**atoms**in 1 mol of nitrogen gas is 2 x 6.02 x 10

^{23}.

(Each nitrogen, N

_{2}molecule consists of 2 nitrogen atoms)

1 mol of ammonia consists of 1 x 6.02 x 10

^{23}

**molecules**

Number of

**atoms**in 1 mol of ammonia gas is 4 x 6.02 x 10

^{23.}

(Each ammonia, NH

_{3}molecule consists of 4 atoms)

1 mol of water consists of 1 x 6.02 x 10

^{23}

**molecules**

Number of

**atoms**in 1 mol of water is 3 x 6.02 x 10

^{23}

(Each water, H2O molecule consists of 3 atoms)

1 mol of argon consistss of 1 x 6.02 x 10

^{23}

**atoms.**

**The correct answer : A**

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