Molarity, Molality, and Percent By Mass

How many moles of sucrose are dissolved in 250 mL of a solution if the solution concentration is 0.150M?

• 37.5 mol

• 0.0006 mol

• 0.038 mol

• 1666.6

What is the molarity of a solution of HNO3 that contains 12.6 grams HNO3 in 1.0 L of solution?

• 0.200M

• 12.6M

• 0.0159M

• 126M

Calculate the molality of 25.0 grams of KBr dissolved in 750.0 mL pure water.

• 18750

• 0.33M

• 30M

• 0.280M

What is the molality of a solution that contains 825mg of NA2HPO4 dissolved in 450.0 mL of water?

• 3.72M

• 0.544M

• 0.0129M

• 1.83M

A sugar solution consists of 35.8 grams and 123.5 grams of water. What is the percent by mass of the sugar in the soluton?

• 45.0%

• 22.2%

• 26.7%

• 35.0%

Determine the percent by mass of a solution made from dissolving 30.0 g of H202 with 70.0 g H20.

• 22.8%

• 89.2%

• 46.9%

• 30.0%