5. It is desired to prepare 500g of 20% mass by mass %age of urea in water. How much urea
should be dissolved in how much volume of water? Density of water is 1g/ml.
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Answer. a = 50g. = 450 / 1 = 450 ml. Hence the mass of urea required would be 50g and the volume of water required would be 450 ml.
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