Mole Conversions

Front

What is a mole in chemistry?

Back

A mole is a unit of measurement used to express the amount of a substance. It is defined as the amount of substance that contains the same number of entities (atoms, molecules, etc.) as there are in 12 grams of carbon-12.

Front

What is Avogadro's number?

Back

Avogadro's number is 6.02 x 10^23, which is the number of atoms, molecules, or particles in one mole of a substance.

Front

How do you calculate the number of moles from the number of atoms?

Back

To calculate the number of moles from the number of atoms, use the formula: \( \text{Number of moles} = \frac{\text{Number of atoms}}{6.02 \times 10^{23}} \)

Front

What is the molar mass of an element?

Back

The molar mass of an element is the mass of one mole of that element, typically expressed in grams per mole (g/mol).

Front

How do you find the mass of a substance using moles?

Back

To find the mass of a substance, use the formula: \( \text{Mass} = \text{Number of moles} \times \text{Molar mass} \)

Front

What is the molar mass of water (H2O)?

Back

The molar mass of water (H2O) is approximately 18.016 g/mol.

Front

How many grams are in 2 moles of sodium chloride (NaCl)?

Back

To find the mass, first calculate the molar mass of NaCl (approximately 58.44 g/mol). Then, use the formula: \( \text{Mass} = 2 \times 58.44 \text{ g/mol} = 116.88 \text{ g} \)

Front

What is the relationship between moles and molecules?

Back

1 mole of any substance contains Avogadro's number (6.02 x 10^23) of molecules.

Front

How do you convert grams to moles?

Back

To convert grams to moles, use the formula: \( \text{Number of moles} = \frac{\text{Mass (g)}}{\text{Molar mass (g/mol)}} \)

Front

What is the molar mass of aluminum sulfate (Al2(SO4)3)?

Back

The molar mass of aluminum sulfate (Al2(SO4)3) is approximately 342.15 g/mol.