Mole Conversions

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 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 molar mass of Lithium (Li)?

Back

The molar mass of Lithium (Li) is approximately 6.94 g/mol.

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 empirical formula?

Back

The empirical formula is the simplest whole-number ratio of elements in a compound.

Front

How do you find the empirical formula from percent composition?

Back

Convert the percentages to grams, then to moles, and simplify the mole ratio to the smallest whole numbers.

Front

What is the conversion factor for moles to molecules?

Back

1 mole = 6.022 x 10^23 molecules.

Front

How do you calculate the molar mass of a compound?

Back

Add the molar masses of all the elements in the compound, multiplied by their respective number of atoms.

Front

What is the molar mass of Sodium Chloride (NaCl)?

Back

The molar mass of Sodium Chloride (NaCl) is approximately 58.44 g/mol.

Front

How do you convert moles to grams?

Back

To convert moles to grams, multiply the number of moles by the molar mass of the substance.