Molarity, Molality & Mass Percent

Calculate the molarity of the following solution: 1.0 mole of KCl in 750.0 mL of solution.

• 0.75 M

• 0.0013 M

• 1.3 M

• 2.0 M

If you have 0.0450 L of 0.465 M potassium bromide. How many moles of potassium bromide are present?

• 10.3mol

• 0.2000 mol

• 0.0968 mol

• 0.0209 mol

What is the molarity of a solution made by adding 1.565 moles of Pb(NO₃)₂ to 500. mL?)

• 300. M

• 0.00313 M

• 3.13 M

• 1.56 M

What mass of solute is needed to make 75.0 g of a 3.4% solution?

• 2.55 g
• 22 g
• 0.05 g

What is the molality of a solution in which 3.0 moles of NaCl is dissolved in 1.5 Kg of water?

• 2.0 M

• 0.22 m

• 135 m

• 2.0m

How many kilograms of H2O must be added to 75.5 g of Ca(NO3)2 to form a 0.500m solution?

• 0.920 Kg

• 0.00662 Kg

• 37.75 Kg

• 0,03775 Kg