question

Which is the molar mass of H2O?

answer

18.02 g/mol

question

What is the molar mass of CHCl3?

answer

119.37 g/mol

question

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

answer

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

question

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

answer

132.17 amu

question

What is the molar mass of a substance?

answer

the mass in grams of one mole of a substance

question

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

answer

Each sample has the same number of molecules.

question

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

answer

6.02 x 10^23

question

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

answer

342.17 g/mol

question

How are a mole and a dozen similar?

answer

Each names a given number of objects.

question

Which statement best describes a mole?

answer

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

question

The mole concept will most likely be used in

answer

determining how many ozone molecules are lost in the atmosphere.

question

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

answer

They both have the same number of atoms.

question

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

answer

a dozen eggs and a dozen jellybeans

question

Which is the molar mass of BF3?

answer

67.81 g/mol