Calculate the amount of water (in grams) that must be added to 5.00 g urea in preparation of 16.2% by mass solution.

Answer 1

% w/w = (g solute/gm soln)*100 =
?
(5g/x)*100 = 16.2
x = (500/16.2) = approx 30.9 g solution.
g urea + g H2O = 30.9 total.
Calculate g H2O to add.

Answer 2

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