A solution is prepared by adding 2 g of a substance A to 18 g of water. Calculate the mass per cent of the solute.
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Mass per cent of A `=(” Mass of A “)/( ” Mass of solution “)xx100`
`= ( 2g)/( 2 g of A+ 18 g of “Water”)xx100`
`= (2 g)/( 20 g) xx 100`
`10 % `