Molar Masses

Question 1

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

Revolt · Accepted Answer

They both have the same number of atoms.

Question 2

How are a mole and a dozen similar?

Revolt · Accepted Answer

Each names a given number of objects.

Question 3

What is Avogadro’s number?

Revolt · Accepted Answer

the number of atoms, molecules, ions, formula units, or other particles in a mole of a substance

Question 4

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

Revolt · Accepted Answer

132.17 amu

Question 5

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

Revolt · Accepted Answer

Each sample has the same number of molecules.

Question 6

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

Revolt · Accepted Answer

a dozen eggs and a dozen jellybeans

Question 7

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

Revolt · Accepted Answer

6.02 1023

Question 8

Which statement best describes a mole?

Revolt · Accepted Answer

It contains 6.02 1023 particles of a given substance.

Question 9

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

Revolt · Accepted Answer

Both are made up of 6.02 1023 formula units.

Question 10

What is the molar mass of CHCl3?

Revolt · Accepted Answer

119.37 g/mol

Molar Masses Answers