1.

Ethylene glycol is used as an antifreeze in a cold climate. Mass of ethylene glycol which should be addedto 4 kg of water to prevent it from freezing at -6^(@)C will be (K_(f) for water = 1.86 Kkg mol^(-1), and molar mass of ethylene glycol =62 g mol^(-1))

Answer»

80.32 G
204.30 g
400.00 g
304.60 g

Solution :`Delta T_(F)=iK_(f)m, Delta T_(f)=6^(@)C, i=1`
`6=1xx1.86xx(W)/(62xx4)rArr w=804.32 g`


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