Molar Masses

Question 1

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 2

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

Revolt · Accepted Answer

132.17 amu

Question 3

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

Revolt · Accepted Answer

342.17 g/mol

Question 4

What is the molar mass of a substance?

Revolt · Accepted Answer

the mass in grams of one mole of a substance

Question 5

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

Revolt · Accepted Answer

6.02 1023

Question 6

Consider the equation below.Na+ + Cl– NaClWhich statement best describes the relationship between the substances in the equation?

Revolt · Accepted Answer

The number of sodium ions is equal to the number of formula units of salt.

Question 7

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 8

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 9

Which is the molar mass of H2O?

Revolt · Accepted Answer

18.02 g/mol

Question 10

What is the molar mass of CHCl3?

Revolt · Accepted Answer

119.37 g/mol

Molar Masses Answers