Mole Chemistry Example 4

Follow the full solution, then compare it with the other examples linked below.

easy

A sample contains

1.204 \times 10^{24}

molecules of ammonia. How many moles of

\text{NH}_3

is this?

1
Convert particles to moles by dividing by Avogadro's number: $n = \frac{1.204 \times 10^{24}}{6.022 \times 10^{23}}$ .
2
$n = 2.00\,\text{mol}$ .

Answer

2.00\,\text{mol of } \text{NH}_3

A mole is a counting unit. Dividing the particle count by Avogadro's number converts a microscopic count into macroscopic moles.

About Mole

The fundamental counting unit in chemistry, defined as exactly $6.022 \times 10^{23}$ particles (atoms, molecules, ions, or other entities).

What is a mole and why is it useful in chemistry?

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