Unit 4 Practice Test ALL

Front

What is Avogadro's number?

Back

Avogadro's number is 6.022 x 10^23, which is the number of molecules in one mole of a substance.

Front

What is the formula for lithium oxide?

Back

The correct formula for lithium oxide is Li2O.

Front

How do you calculate the number of molecules in moles?

Back

To calculate the number of molecules, multiply the number of moles by Avogadro's number (6.022 x 10^23).

Front

What is the conversion factor when converting mass to moles?

Back

The conversion factor is mass = 1 mole.

Front

What units should you use when calculating atoms?

Back

When calculating atoms, your units should be atoms.

Front

What is the molar mass of methane (CH4)?

Back

The molar mass of methane (CH4) is approximately 16.05 g/mol.

Front

How many grams are in 2 moles of water (H2O)?

Back

There are approximately 36.04 grams in 2 moles of water (H2O).

Front

What is the relationship between moles and mass?

Back

The relationship is given by the formula: mass (g) = moles x molar mass (g/mol).

Front

How many moles are in 12 grams of carbon (C)?

Back

There are 1 mole of carbon in 12 grams, as the molar mass of carbon is 12 g/mol.

Front

What is the formula for calculating the number of atoms from moles?

Back

Number of atoms = moles x Avogadro's number (6.022 x 10^23).