1.

The boiling point of a solution containing 2.62 g of a substance A in 100 g of water is higher by 0.0512^(@)C than the boiling point of pure water. The molar mass of the substance ( K_(b)=5.12Km^(-1) ) is :

Answer»

131
262
26.2
2620

Solution :`M_(B)=(K_(b)xx1000 xx w_(B))/(w_(A)xx DELTA T_(b))`
`=(5.12xx1000xx2.62)/(100 xx 0.0512)=2620`


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