Moles

Front

What is a mole in chemistry?

Back

A mole is a unit of measurement used to express the amount of a substance, defined as containing exactly 6.02 x 10^23 representative particles.

Front

What is Avogadro's number?

Back

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

Tags

NGSS.HS-PS1-7

Front

How do you calculate the number of moles from mass?

Back

To calculate the number of moles, divide the mass of the substance (in grams) by its molar mass (in g/mol).

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).

Tags

NGSS.HS-PS1-7

Front

How many grams are in one mole of carbon (C)?

Back

One mole of carbon (C) has a mass of 12.01 grams.

Front

What is the molar mass of magnesium (Mg)?

Back

The molar mass of magnesium (Mg) 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 mass of 2 moles of water (H2O)?

Back

The mass of 2 moles of water (H2O) is approximately 36.04 grams.

Front

How many moles are in 10 grams of sodium chloride (NaCl)?

Back

To find the number of moles in 10 grams of sodium chloride, divide 10 grams by the molar mass of NaCl (58.44 g/mol), which equals approximately 0.171 moles.

Tags

NGSS.HS-PS1-7

Front

What is the relationship between moles and molecules?

Back

One mole of any substance contains Avogadro's number (6.02 x 10^23) of molecules or representative particles.