Question

How many atoms of mercury are present in
3.2 cubic centimeters of liquid mercury?
The density of mercury is 13.55 g/cc.
Answer in units of atoms.

Answer 1

mass Hg = volume x density = ?
200.59 g Hg contains 6.02E23 atoms Hg. So ? g Hg will have ...... atoms Hg.

Answer 2

density=mass/volume

13.55*3.2=43.36g

1 mole of Hg=200.59

0.2 mole=43.36g


mole=number of atom/avogadroes number

atom=0.2*6.02*10^23

atom=1.204*10^23