Worksheet: Masses and Moles
In this worksheet, we will practice using the formula mass of a compound to convert between the mass of material and number of moles present.
Calcium carbonate has the formula .
What is the mass of one mole of calcium carbonate to the nearest gram?
What is the mass of one formula unit of calcium carbonate to 3 significant figures?
- A g
- B g
- C g
- D g
- E g
Calculate to 3 significant figures the number of moles present in 500 g of pure calcium carbonate.
Which of the following represents the greatest mass?
- A 2.00 mol of calcium oxide
- B 110 g of calcium
- C molecules of oxygen gas
- D 3 mol of calcium
- E 80 L of oxygen gas at 1.00 bar and 298 K
When 10.00 g of water partially evaporates, water molecules are removed as vapor. Calculate the mass of water remaining.
A packet of an artificial sweetener contains 40.0 mg of saccharin , which has the structural formula:
Saccharin has a molar mass of 183.18 g/mol.
How many saccharin molecules are there in the packet of artificial sweetener?
How many carbon atoms are there in this quantity of saccharin?
Which of the following is furthest from a mole of atoms?
- A 15.999 g
- B 79.904 g
- C 10.81 g
- D 7.023 g
- E 24.305 g
Which of the following is furthest from a mole of molecules/formula units?
- A 20.01 g hydrogen fluoride
- B 100.09 g calcium carbonate
- C 154.99 g cobalt(II) sulfate
- D 79.90 g bromine gas
- E 16.04 g methane
There is approximately 1 g of graphite in a pencil. How many moles of carbon atoms are there in 1.0 g of graphite?
Which of these has the greatest mass?
Which of the following contains the greatest number of moles of oxygen atoms?