Moles and Molar mass

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 molar mass of a compound?

Back

To calculate the molar mass, sum the atomic masses of all the atoms in the compound's formula, using the periodic table.

Front

What is the molar mass of carbon (C)?

Back

The molar mass of carbon is approximately 12.01 g/mol.

Front

What is the molar mass of oxygen (O)?

Back

The molar mass of oxygen is approximately 16.00 g/mol.

Front

How many grams are in 1 mole of a substance?

Back

1 mole of a substance contains a mass equal to its molar mass in grams.

Front

What is the relationship between moles and atoms?

Back

1 mole of any substance contains Avogadro's number (6.022 x 10^23) of atoms or molecules.

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/mol).

Front

What is the formula to find the number of moles from a given number of atoms?

Back

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

Front

What is the molar mass of sodium chloride (NaCl)?

Back

The molar mass of sodium chloride is approximately 58.44 g/mol.

Front

If you have 2 moles of a substance, how many grams do you have if the molar mass is 18 g/mol?

Back

You have 36 grams (2 moles x 18 g/mol).