posted by Anonymous .
Givien a 2.0kg solution of phosphoric acid and water 53% phosphoric acid by mass calculate the number of moles of phosphoric acid
53% H3PO4 means 53 g H3PO4/100 g soln. So 2 kg soln will have
53 x 2000g/100g = about 1060g H3PO4.
Then moles = grams/molar mass.