Q1.Taking the density of copper 9 g cm-3
, find the mass of 5 m3
of copper.
Answers
Answered by
0
Answer:
Explanation:
density=
volume
mass
molar mass
density
=
atomic mass
mass
×
volume
1
=
volume
no. of moles
⟹
v
n
=
63.5
9×10
3
kgm
−3
In 1 m
3
, ⟹n=
63.5
9×10
3
kg=141.73×10
3
moles
No. of Cu atoms=141.73×10
3
×6.023×10
23
=8.53×10
28
As 1 Cu atom provides 1 free electron.
Thus, no. of free electrons=8.53×10
28
≃10
29
Similar questions