Suppose that a solution was prepared by dissolving 18.0 g of sugar into 100g of water. The percent by mass in the nearest whole number would be calculated as follows:

If a solution is made by taking 70 mL of ethanol and adding enough water to make 750 mL of solution, the percent volume is:

A 20 g tube of cream contains 1.2 % w/w of active ingredient. What is the mass of the active ingredient does the cream contain?

What is the percentage of water in CuSO₄.5H₂O

How many grams of AgNO₃ are needed to prepare 0.125 M solution in 250 mL of water?

What volume, in milliliters, of 10.0 M NaOH is needed to prepare 300 mL of 2.00 M NaOH by dilution?

What is the molality of a solution made by dissolving 2 moles of NaOH in 400 grams of water?

The %w/w of a solution is 3.4%. What is the mass of solute if the solution is 75 g?

The molality of a solution containing 20.7 g of potassium carbonate dissolved in 500 mL of solution:

_{(assume density of solution =1 g mL}^–1_).

A solution is 25% water, 25% ethanol and 50% acetic acid by mass. The mole fraction of water is:

The mass percentage of iron in copper pyrites (CuFeS₂) is:

What mass, in grams, of sodium sulfate is needed to make 275 g total of a 1.5% aqueous solution of sodium sulfate?

If you want to prepare a 200 mL aqueous solution of MgO which is 20% by mass magnesium oxide, how many grams of magnesium oxide would be needed?(assume that the density of the solution is the same as the density of water)

The density of 2 M aqueous solution of NaOH is 1.28 g/cm³. What is the molality of the solution?

Percentage by volume of 0.45 mL NaCl in 50 mL NaCl solution is

What is the mass of solute (in g) for 25% by mass of 1 kg solution.

What is the mol fraction of CuSO₄ prepared by dissolving 30 g of CuSO₄ in 200 g of water?

10 g of KCl is dissolve in 1000 g of water. If the density of the solution is 0.997 g/cm3, calculate the molality of the solution.