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A flask filled with C Cl4 vapour was wei...

A flask filled with `C Cl_4` vapour was weighed at a temperature and pressure. The flask was then filled with oxygen at the same temperature and pressure. The mass of `C Cl_4` vapour would be about

A

the same as that of the oxygen

B

one-fifth as heavy as oxygen

C

five times as heavy as oxygen

D

twice as heavy as oxygen

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The correct Answer is:
C
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