Chemistry 2 - Molar Masses

Which is the molar mass of H2O?

18.02 g/mol

What is the molar mass of CHCl3?

119.37 g/mol

Which best compares 1 mol of sodium chloride to 1 mol of aluminum chloride?

Both are made up of 6.02 x 10^23 formula units.

Which is the formula mass of (NH4)2SO4?

132.17 amu

What is the molar mass of a substance?

the mass in grams of one mole of a substance

How does the number of molecules in 1 mol of oxygen compare with the number of molecules in 1 mol of nitrogen?

Each sample has the same number of molecules.

Which value gives the number of particles in 1 mol of a substance?

6.02 x 10^23

What is the molar mass of Al2(SO4)3?

342.17 g/mol

How are a mole and a dozen similar?

Each names a given number of objects.

Which statement best describes a mole?

It contains 6.02 x 10^23 particles of a given substance.

The mole concept will most likely be used in

determining how many ozone molecules are lost in the atmosphere.

Magnesium and iron are metallic elements. How does a mole of magnesium compare with a mole of iron?

They both have the same number of atoms.

In a classroom, which comparison would a teacher most likely use for describing a mole?

a dozen eggs and a dozen jellybeans

Which is the molar mass of BF3?

67.81 g/mol