3
o No of gold atomd present in a gold Sheet
having dimensions 2x2*2 cm? given density
19.7 glass. & its atomic mass
198 amu,
Answers
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0
Answer:
Correct option is C)
Volume occupied by one gram atom of gold =
ρ
m
=
19.7g/cm
3
197g
=10cm
3
Volume of one atom =
N
A
10
=
6×10
−23
10
=
3
5
×10
23
cm
3
Let r be the radius of the atom.
∴
3
4
πr
3
=
3
5
×10
23
r
3
=
4×3.14
50×10
−24
r=1.5×10
−10
m
Explanation:
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