simple calculation need it 1 hours

Solution Mass Percent Worksheet

(1) A solution of HCl(aq) is labeled as 37 mass%. How many grams of HCl is contained in 200 g of solution?

(2) How many grams of solute and how many grams of solvent are contained in 450 g of a 2.50% NaCl(aq) solution?

(3) How many grams of AgNO3 must be added to make 157 g of a 1.44 mass% AgNO3 solution?

(4) How many kg of sugar must be added to make 1.000 kg of a 0.250 mass% sugar solution?

(5) 16.2 mg of aspirin is dissolved in 1.00 g of solution. What is the concentration of the aspirin solution in mass%?

(6) 11.28 g of KOH is dissolved in 250.00 g of water. What is the concentration of the KOH solution in mass%?

(7) How many moles of NaCl are contained in 55.5 g of a solution saltwater solution that is 12.3% NaCl by mass?

(8) How many moles of ethanol (molar mass 46.068 g/mol) are there is 250.0 g of gasoline if the gasoline is labeled “contains 10.0% ethanol by mass”?

(9) A small quantity of iodine is dissolved in ethanol (alcohol) to make a solution to apply to cuts and wounds. But iodine isn’t very soluble in ethanol. The solubility is 0.0290 g I2 per 100 mL of ethanol. The density of the resulting solution (mostly ethanol) is 0.789 g/mL. What is the mass% I2 in this solution?

(10) 80-proof vodka contains 272.7 g of alcohol per 750 mL bottle. The density of vodka is 0.909 g/mL. What is the mass% alcohol in vodka?