Atoms in chemistry

Question

A coin contains 0.0800 moles of silver. How many silver atoms are in the coin?

Answer 1

This problem is about molar conversions, which requires dimensional analysis and careful attention to significant figures. We will need Avogadro's number (6.02 x 10²³, rounding to three significant figures!).

Now we roll up our sleeves and dig into some dimensional analysis as follows:

(0.0800 moles Ag) * (6.02 x 10²³ atoms Ag) / (1 mole Ag) = 4.82 atoms Ag.

Remember to round the final answer to three significant figures!