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Standard VII
Mathematics
Percentages
Percentage co...
Question
Percentage composition of carbon in the compound tetrahydrocarbinol is:
A
60.46%
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B
70.85%
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C
80.13%
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D
59.64%
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Solution
The correct option is
C
80.13%
Molecular formula of tetrahydrocannabinol =
C
21
H
30
O
2
Molor mass of tetra hydrocannabinol =
1
0.00318
= 314.45
g
m
M
o
l
−
1
Percentage composition of C =
12
×
21
314.45
×
100
= 80.13 %
Hence. the correct option is
(
C
)
.
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