Quiz: Particles, Moles and Molar Mass

For mass to mole conversions, which is the correct conversion factor?

• 22.4 L/mol
• 6.02 e23
• Molar Mass
• Multiply by 100

For representative particles (atoms, molecules, formula units, etc.) to mole conversions, which is the correct conversion factor?

• 22.4 L/mol
• 6.02 e23
• Molar Mass
• Multiply by 100

To calculate the molar mass of a substance:

• multiply mass by molar mass.
• Use molar masses of elements from the periodic table
• grams/mole
• divide mass by molar mass.

What is a Mole?

• the conditions under which a volume of a gas is usually measured; standard temperature is 0 degrees C, and standard pressure is 101.3 kPa, or 1 atmosphere (1 atm)
• the percent by mass of each element in a compound
• the amount of a substance that contains 6.02 x 10²³ representative particles of that substance
• equal volumes of gases at the same temperature and pressure contain equal numbers of particles

What is the molar mass of Carbon?

• 6.02 g/mol
• 16.00 g/mol
• 14.01 g/mol
• 12.01 g/mol

What is the molar mass of H₂0

• 17.01 g/mol
• 33.01 g/mol
• 18.02 g/mol
• 2.00 g/mol

How many moles in 32 grams of O₂

• 2 moles
• 1 mole
• 0.5 mole
• 3 moles

How many moles are in 2.00 grams of H₂O?

• 1.11 moles
• 0.111 moles
• 36 moles
• 9 moles

One mol of potassium has a mass of ________.

• 6.022 × 10 ²³g
• 30.98 g
• 19.00 g
• 39.10 g