Question

How many atoms are in 12.0 cm3 of mercury (at room temperature)?

Answer 1

density of mercury at room temp is 13.6 g/cm3
as the volume is given as 12cm3, so we can calculate mass by density formula
D=M/V
mass=163.2 grams
now calculate moles of mercury by the help of this mass
MOLES=MASS/MOLar mass
moles=0.816
now multiply these no of moles by avogadro's no.
Ans=4.914*10^23