Chemistry, asked by sonu7166, 10 months ago

the vapour pressure of pure benzene at an certain temperature is 0.850 bar a non valatile non electrolyte solid weighing 0.5 g when added to 39.0 of benzene molar mass 789 mol vapour pressure of solutions then is 0.845bar what is the molar mass of the solid substance​

Answers

Answered by Sanayasilawat
3

Explanation:

ANSWER

p 0p 0 −p = W 1M 2W 2M 1p 0

=0.850bar= vapour pressure of pure benzene.

p=0.845bar= vapour pressure of solution.

W 1=39g= mass of benzene

W 2 =78g= mass of solute

M 1=78g/mol= Molar mass of benzene.

M 2= Molar mass of solute.

0.850bar

0.850bar−0.845bar= 39g×M 20.5g×78g/mol

M 2 =170g/mol

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