Question

Which is the number of atoms in 4.5 moles of Hg, correctly written in scientific notation with the correct number of significant figures?

Answer 1

A: 2.7 x 10^24

Step-by-step explanation:

Answer 2

Avogadro's number represents the number of units in one mole of any substance. This has the value of 6.022 x 10^23 units / mole. This number can be used to convert the number of atoms or molecules into number of moles.

4.5 moles ( 6.022x10^23 atoms / 1 mol ) = 2.7x10^24 atoms Hg.