Concentrated sulfuric acid used in the laboratory is 92% H2SO4 by mass. Calculate the mass of water in a 100 g solution of this acid in kg.

Answer 1

92% H2SO4 by mass means 92g H2SO4/100 g solution.
If H2SO4 is 92 g H2SO4 in the 100 g of soln, then water must account for the other 8 grams. Now convert that to kg.