Moles

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 as many entities (atoms, molecules, etc.) as there are in 12 grams of carbon-12.

Front

What is the molar mass of a substance?

Back

The molar mass is the mass of one mole of a substance, typically expressed in grams per mole (g/mol). It can be found on the periodic table.

Front

How many atoms are in one mole of a substance?

Back

One mole of any substance contains 6.02 x 10^23 entities, known as Avogadro's number.

Front

What is the molar mass of table salt (NaCl)?

Back

58.44 g/mol.

Front

How do you calculate the number of moles from mass?

Back

Number of moles = mass (g) / molar mass (g/mol).

Front

What is the relationship between grams and moles?

Back

Grams can be converted to moles using the molar mass of the substance.

Front

What is the molar mass of Neon (Ne)?

Back

20.18 g/mol.

Front

How many moles are in 39.95 g of argon (Ar)?

Back

39.95 g of argon is equal to 1 mole.

Front

What is the formula to find the number of atoms in a sample?

Back

Number of atoms = number of moles x Avogadro's number (6.02 x 10^23).

Front

What is molarity?

Back

Molarity is a measure of concentration, defined as the number of moles of solute per liter of solution (mol/L).