A) 65.25
B) 54.94
C) 63.55
D) 87.62
Correct Answer: A
Solution :
Given that, \[W=2.175g,m=?\] \[W=39.0g\] \[M=78\] (Mol. mass of benzene) \[P{}^\circ =640mm\] \[{{\text{P}}_{s}}=600\text{ }mm\] From the formula, \[\frac{P{}^\circ -{{P}_{s}}}{{{P}_{s}}}=\frac{W\times M}{m\times W}\] Or \[\frac{640-600}{600}=\frac{2.175\times 78}{m\times 39}\] Or \[m=65.25\]You need to login to perform this action.
You will be redirected in
3 sec