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Question

What is the molecular mass of CCl4?
Given the atomic mass of C=12 u and Cl=35.5 u


A

150.5 u

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B

154 u

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C

160 u

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D

342.5 u

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Solution

The correct option is B

154 u


Molecular mass is the sum of atomic mass of all the constituent atoms present in the molecule.

Atomic mass of the elements in CCl4:
Atomic mass of C = 12 u
Atomic mass of Cl = 35.5 u

Thus, the molecular mass of CCl4 = 12 + (4×35.5) = 154 u.


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