The Mole and Molar Mass

If you have 3 moles of sodium (Na), how many grams do you have?

• 23 g

• 46 g

• 69 g

• 92 g

What is the molar mass of water (H2O)?

• 16 g/mol

• 18 g/mol

• 20 g/mol

• 22 g/mol

What is the mass of 2.50 mol of oxygen gas (O2)?

• 32 g

• 64 g

• 80 g

• 100 g

How do you calculate the molar mass of a compound?

• Multiply the number of atoms of each element by its atomic mass and sum them up.

• Add the molar masses of all the elements in the compound.

• Divide the total mass of the compound by the number of moles.

• Use the density of the compound to find its molar mass.

What is the mass of 1 mole of carbon (C)?

• 10 g

• 12 g

• 14 g

• 16 g

What is the mass of 0.5 moles of sodium chloride (NaCl)?

• 25 g

• 29 g

• 30 g

• 32 g

What is the formula to convert grams to moles?

• Moles = Mass (g) × Molar Mass (g/mol)

• Moles = Mass (g) ÷ Molar Mass (g/mol)

• Moles = Mass (g) + Molar Mass (g/mol)

• Moles = Mass (g) - Molar Mass (g/mol)

What is the definition of molar mass?

• Number of grams per one mole of a substance.

• The mass of a single atom in atomic mass units.

• The total mass of a compound divided by the number of molecules.

• The weight of a substance in kilograms per liter.

What is molar mass?

• The mass of a mole of atoms.

• The weight of a single atom.

• The total mass of a compound.

• The mass of a molecule in grams.

What is the mass of 1 mole of aluminum (Al)?

• 24 g

• 27 g

• 30 g

• 32 g