Mole Conversions

If you have 3 moles of a substance, how many molecules do you have?

• 1.81 x 10²⁴ molecules

• 1.81 x 10²³ molecules

• 6.02 x 10²³ molecules

• 3.01 x 10²⁴ molecules

What is the significance of the mole in chemistry?

• It is a unit of temperature measurement.

• It allows chemists to count particles by weighing them.

• It is used to measure the volume of gases.

• It represents the speed of chemical reactions.

How do you convert moles to grams?

• Add the number of moles to the molar mass of the substance.

• Multiply the number of moles by the molar mass of the substance.

• Divide the number of moles by the molar mass of the substance.

• Subtract the molar mass from the number of moles.

What is the volume of 1 mole of an ideal gas at STP?

• 24.0 liters

• 22.4 liters

• 20.0 liters

• 18.0 liters

How do you calculate the number of moles from a given number of particles?

• Multiply the number of particles by Avogadro's number (6.02 x 10²³).

• Add Avogadro's number (6.02 x 10²³) to the number of particles.

• Divide the number of particles by Avogadro's number (6.02 x 10²³).

• Subtract Avogadro's number (6.02 x 10²³) from the number of particles.

What is the unit of molar mass?

• grams/mole

• kilograms/liter

• moles/gram

• grams/liter

What is the relationship between moles and molecules?

• 1 mole of a substance contains 6.02 x 10²³ molecules.

• 1 mole of a substance contains 3.01 x 10²³ molecules.

• 1 mole of a substance contains 1.2 x 10²⁴ molecules.

• 1 mole of a substance contains 6.02 x 10²² molecules.

How many moles are in 5.68 x 10²⁴ molecules of AlCl₃?

• 7.20 moles

• 9.44 moles

• 11.50 moles

• 8.00 moles

What is the formula to convert grams to moles?

• Moles = grams / molar mass.

• Moles = grams × molar mass.

• Moles = grams + molar mass.

• Moles = grams - molar mass.

How many atoms are in 1 mole of NaCl?

• 6.02 x 10²³ atoms

• 3.01 x 10²³ atoms

• 1.20 x 10²⁴ atoms

• 9.00 x 10²² atoms