Understanding the Mole and Molar Mass

What is the primary reason for using the mole in chemistry?

• To simplify the counting of large numbers of small particles.

• To determine the color of compounds.

• To measure the volume of gases.

• To calculate the speed of chemical reactions.

Avogadro's number is equivalent to which of the following?

• 3.14

• 1000

• 12

• 6.022 * 10^23

How is molar mass defined in relation to atomic mass?

• Molar mass is the atomic mass expressed in seconds.

• Molar mass is the atomic mass expressed in meters.

• Molar mass is the atomic mass expressed in liters.

• Molar mass is the atomic mass expressed in grams.

What is the molar mass of water?

• 18.02 g/mol

• 44.1 g/mol

• 1.01 g/mol

• 12.01 g/mol

Which of the following is a correct conversion factor for moles to particles?

• 1 mole = 3.14 particles

• 1 mole = 12 particles

• 1 mole = 1000 particles

• 1 mole = 6.022 * 10^23 particles

How many atoms are in 1.5 moles of gold?

• 9.03 * 10^23 atoms

• 1.5 * 10^23 atoms

• 6.022 * 10^23 atoms

• 3.01 * 10^23 atoms

What is the molar mass of oxygen?

• 1.01 g/mol

• 32.00 g/mol

• 12.01 g/mol

• 16.00 g/mol

How many moles are in 29.58 g of carbon?

• 1.5 moles

• 2.463 moles

• 6.022 moles

• 12.01 moles

What is the first step in converting grams of sulfur to atoms?

• Convert grams to seconds.

• Convert grams to liters.

• Convert grams to moles.

• Convert grams to meters.

What is the numeric equivalent of a mole in terms of particles?

• 1000

• 3.14

• 12

• 6.022 * 10^23