A6.7.4b: Multi-Step Mole Conversions

What is the central unit used in stoichiometry for conversions?

• Moles

• Particles

• Grams

• Liters

At what conditions is the conversion factor 22.4 L/mol used?

• At boiling point of water

• At STP

• At room temperature

• Under vacuum

What does Avogadro's number represent?

• Mass of 1 mole of substance

• Volume of 1 mole of gas at STP

• Number of particles in 1 mole of substance

• Number of particles in 1 gram of substance

How many steps are involved in the conversion from mass to particles?

• Four steps

• Three steps

• Two steps

• One step

What is the molar mass of iron?

• 32 grams/mole

• 6.022 grams/mole

• 22.4 grams/mole

• 55.85 grams/mole

What is the correct sequence of conversions to calculate the number of atoms from mass?

• Mass to moles to particles

• Mass to particles to moles

• Particles to moles to mass

• Moles to mass to particles

What conversion factor is used for converting volume to moles at STP?

• 55.85 g/mole

• 22.4 L/mole

• Avogadro's number

• Molar mass

What is the molar mass of diatomic oxygen used in the calculations?

• 44 g/mole

• 16 g/mole

• 64 g/mole

• 32 g/mole

How many significant figures are reported in the final answer for the mass of oxygen?

• Five

• Two

• Three

• Four

What is the purpose of setting up a conversion table in stoichiometry problems?

• To organize the data and ensure correct unit conversions

• To calculate the molar mass

• To determine the experimental error

• To measure the temperature and pressure