Molarity and Moles of Sucrose

The video tutorial covers calculations related to molarity, focusing on three main problems: determining the concentration of a sucrose solution from its mass and volume, finding the mass of sucrose in a given volume of a molar solution, and calculating the volume of a solution from a given mass and molarity. The tutorial emphasizes converting between grams and moles, using molar mass, and applying the formula for molarity (moles per liter) to solve these problems.

What is the formula for calculating molarity?

• Liters per mole

• Grams per liter

• Grams per mole

• Moles per liter

How many moles of sucrose are in 50 grams if the molar mass is 342.3 g/mol?

• 0.200 moles

• 0.146 moles

• 0.292 moles

• 0.073 moles

What is the concentration of a solution with 0.146 moles of sucrose in 0.210 liters?

• 0.500 M

• 0.696 M

• 0.348 M

• 1.392 M

What is the molar mass of sucrose?

• 342.3 g/mol

• 180.2 g/mol

• 58.4 g/mol

• 98.1 g/mol

If a solution has a concentration of 0.250 M and a volume of 0.750 liters, how many moles of sucrose does it contain?

• 0.250 moles

• 0.125 moles

• 0.375 moles

• 0.188 moles

What is the mass of sucrose in a 0.250 M solution with a volume of 750 mL?

• 64.4 grams

• 32.2 grams

• 128.8 grams

• 16.1 grams

How many moles are in 10 grams of sucrose if the molar mass is 342.3 g/mol?

• 0.0200 moles

• 0.0146 moles

• 0.0584 moles

• 0.0292 moles

What is the volume of a solution with 0.0292 moles of sucrose and a molarity of 2.3 M?

• 50.8 mL

• 12.7 mL

• 25.4 mL

• 6.35 mL

If you dissolve 10 grams of sucrose in water to make a 2.3 M solution, what is the resulting volume?

• 50.8 mL

• 25.4 mL

• 12.7 mL

• 6.35 mL

What is the concentration of a solution if 0.0292 moles of sucrose are dissolved in 12.7 mL of water?

• 0.575 M

• 1.15 M

• 2.3 M

• 4.6 M