1.

If 5.85 gms of NaCl are dissolved in 90 gms of water, the mole fraction of NaCl is

Answer»

`0.1`
`0.2`
`0.3`
`0.0196`

Solution :`5.85 G NaCl=(5.85)/(58.5)` mole = 0.1 mol
`90 g H_(2)O=(90)/(18)` MOLES = 5 moles
mole fraction of NaCl = `(0.1)/(5+0.1)~~0.0196`.


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