Moles

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 sodium fluoride (NaF)?

Back

The molar mass of sodium fluoride (NaF) is approximately 41.99 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 molar mass of Iron (Fe)?

Back

The molar mass of Iron (Fe) is 55.93 g/mol.

Front

What is the relationship between moles and grams?

Back

The number of grams of a substance can be calculated by multiplying the number of moles by the molar mass of the substance.

Front

If you have 2 moles of water (H2O), how many grams do you have?

Back

2 moles of water (H2O) is approximately 36 grams (2 moles x 18 g/mol).

Front

What is the mass of 0.5 moles of sodium chloride (NaCl)?

Back

The mass of 0.5 moles of sodium chloride (NaCl) is approximately 29.25 grams (0.5 moles x 58.5 g/mol).

Front

What is Avogadro's number?

Back

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

Front

How many moles are in 100 grams of glucose (C6H12O6)?

Back

There are approximately 0.56 moles of glucose in 100 grams (100 g / 180 g/mol).