Multiple Step 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

How do you convert atoms to moles?

Back

To convert atoms to moles, divide the number of atoms by Avogadro's number (6.02 x 10^23).

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 atoms in a given mass of an element?

Back

First, convert the mass to moles using the molar mass of the element. Then, multiply the number of moles by Avogadro's number.

Front

What is the molar mass of magnesium (Mg)?

Back

The molar mass of magnesium is approximately 24.31 g/mol.

Front

How do you convert grams to moles?

Back

To convert grams to moles, divide the mass of the substance by its molar mass.

Front

What is the molar mass of diphosphorus pentoxide (P2O5)?

Back

The molar mass of diphosphorus pentoxide is approximately 283.88 g/mol.

Front

What is the volume of one mole of gas at STP?

Back

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

Front

How do you calculate the mass of a compound from the number of formula units?

Back

To calculate the mass, first convert the number of formula units to moles using Avogadro's number, then multiply by the molar mass of the compound.

Front

What is the molar mass of strontium chloride (SrCl2)?

Back

The molar mass of strontium chloride is approximately 158.53 g/mol.