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What is the molecular mass of a compound...

What is the molecular mass of a compound `X`, if its `3.0115 xx 10^(9)` molucules weigh `1.0 xx 10^(-12) g?`

A

150 g

B

200 g

C

630 g

D

500 g

Text Solution

Verified by Experts

The correct Answer is:
B
`3.0115 xx 10^(9) " molecules of X"=10^(-12)g`
`6.023xx 10^(23)" molecules of X"=(10^(-12)xx6.023xx10^(23))/(3.0115xx10^(9))`
= 200 g = 200 amu
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