Understanding Molar Mass and Conversions

What is the main tool used to convert between the mass of a substance and the amount in moles?

• Periodic table

• Molar mass

• Atomic mass

• Avogadro's number

What is the molar mass of hydrogen in grams per mole?

• 1.8 g/mol

• 1.0 g/mol

• 1.6 g/mol

• 2.0 g/mol

How many hydrogen atoms are equivalent to one mole of hydrogen?

• 6.022 x 10^25

• 6.022 x 10^22

• 6.022 x 10^23

• 6.022 x 10^24

If you have 16.5 grams of hydrogen, how many moles do you have?

• 9.2 moles

• 16.4 moles

• 8.2 moles

• 18.4 moles

What is the first step in using conversion factors to find the number of moles from grams?

• Add the atomic mass

• Use the molar mass as a conversion factor

• Divide by the atomic number

• Multiply by Avogadro's number

What is the mass of a single oxygen atom in grams?

• 3.2 x 10^-22 g

• 2.7 x 10^-23 g

• 3.2 x 10^-23 g

• 2.7 x 10^-22 g

Which number is used to convert between atoms and moles?

• Faraday's constant

• Boltzmann's constant

• Planck's constant

• Avogadro's number

What is the molar mass of oxygen in grams per mole?

• 12 g/mol

• 18 g/mol

• 14 g/mol

• 16 g/mol

What is the purpose of using molar mass in conversions?

• To calculate the speed of a reaction

• To find the volume of a gas

• To convert between mass, moles, and atoms

• To determine the density of a substance

Which of the following is NOT a use of molar mass?

• Converting moles to atoms

• Converting mass to moles

• Converting atoms to volume

• Converting moles to mass