Q 10 mass percent

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You wish to prepare 198 grams of 10.0%AgCH3COO solution. You will need grams of silver acetate and mL of water. Assume that the density of water is 1.00g/mL. How many grams of ZnSO4 are there in 209 grams of an aqueous solution that is 15.5% by weight ZnSO. gZnSO4 An aqueous solution of sodium hydroxide, NaOH, contains 1.21 grams of sodium hydroxide and 17.5 grams of water. The percentage by mass of sodium hydroxide in the solution is %