Mole Review

Front

What is a mole in chemistry?

Back

A mole is a unit of measurement used to express amounts of a chemical substance, defined as exactly 6.022 x 10^23 particles (atoms, molecules, ions, etc.).

Front

How do you calculate the number of molecules in a given number of 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 molar mass of a substance?

Back

The molar mass is the mass of one mole of a substance, typically expressed in grams per mole (g/mole).

Front

How do you convert grams to moles?

Back

To convert grams to moles, divide the mass of the substance (in grams) by its molar mass (in g/mole).

Front

What is dimensional analysis in chemistry?

Back

Dimensional analysis is a mathematical technique used to convert between units by multiplying by conversion factors.

Front

How many moles are in 18 grams of water (H2O)?

Back

1 mole (Molar mass of H2O is 18 g/mole).

Front

What is the formula to calculate the number of atoms from moles?

Back

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

Front

What is the molar mass of sodium hydroxide (NaOH)?

Back

The molar mass of NaOH is 40.00 g/mole.

Front

How do you find the number of grams from moles?

Back

To find grams from moles, multiply the number of moles by the molar mass of the substance.

Front

What is the relationship between moles and volume in gases at STP?

Back

At standard temperature and pressure (STP), 1 mole of an ideal gas occupies 22.4 liters.