Answer:
7.51
×
10
24
The density
ρ
of a sample is its ratio of mass
m
to volume
V
:
ρ
=
m
V
.
To find the number of atoms in this sample, first multiply the volume by the density to get the mass. Then divide this mass by the mass of one atom.
133
c
m
3
T
a
(
17.0
g
1
c
m
3
)
(
1
atom
T
a
3.01
×
10
−
22
g
T
a
)
=
7.51
×
10
24
Ta atoms
