how many grams of silicon would there be in a sample that contained 9.99 x 10²² atoms?
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3
Answer:
Mass of Silicon is 5.0 grams in a computer chip.
Explanation:
Given:
Number of Atoms Of silicon =
1.08
⋅
10
23
Avogadro number =
6.023
⋅
10
23
Molar Mass of Silicon =
28.09
g/mol
Required:
Mass of silicon in computer chip = ?
Using Formula:
Number of moles(n) = number of atoms(N)/ Avogadro Number(Na)
n
=
1.08
⋅
10
23
/
6.023
⋅
10
23
n
=
0.17
moles
Now applying second formula for calculating Mass of silicon;
Number of moles = mass of silicon / Molar mass of silicon
n =
m
M
By Cross multiplication;
m
=
n
⋅
M
Now apply moles
(
n
)
of silicon value here;
m
=
0.17
m
o
l
⋅
28.09
g / mol
m = 5.0 g.
Hope this Helps.. ^_^
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