How many atoms are in 4.5 moles of nitrogen

Explanation:

To convert from moles to atoms, Avogadro's Number: 6.022*10²³ must be used. This number tells us the amount of particles (atoms, molecules, etc) in 1 mole of a substance. In this case, the particles are atoms of nitrogen.

Multiply by the given number of moles: 4.5

The moles of nitrogen will cancel.

The denominator of 1 can be ignored.

The original measurement of moles had 2 significant figures, so our answer must have the same. For the number we calculated, that is the tenth place. The 0 in the hundredth place tells us to leave the 7.

There are about 2.7*10²⁴ atoms of nitrogen in 4.5 moles.

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