There are 6.022 Times. 1023 atoms of Hg in 1 mole of Hg. The number of atoms in 4.5 moles of Hg can be found by multiplying 4.5 by 6.022 Times. 1023.

Which is the number of atoms in 4.5 moles of Hg, correctly written in scientific notation with the correct number of significant figures?
2.7 Times. 1024
27 Times. 1023
2.71 Times. 1024
27.099 Times. 1023