Moles

Front

What is a mole?

Back

A mole is a unit of measurement in chemistry that represents 6.02 x 10^23 representative particles (atoms, molecules, ions, etc.).

Front

What does Avogadro's number represent?

Back

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

Tags

NGSS.HS-PS1-7

Front

What is the percent composition of a compound?

Back

Percent composition is the percentage by mass of each element in a compound.

Front

How do you calculate the percent composition of a compound?

Back

Percent composition = (mass of element in 1 mole of compound / molar mass of compound) x 100%.

Front

What is the molar mass of magnesium (Mg)?

Back

The molar mass of magnesium (Mg) is approximately 24.31 grams per mole.

Front

How many grams are in 1 mole of water (H2O)?

Back

1 mole of water (H2O) has a mass of approximately 18 grams.

Front

What is the mole ratio in a balanced chemical equation?

Back

The mole ratio is the ratio of the coefficients of the reactants and products in a balanced chemical equation.

Front

What can be determined from a balanced chemical equation?

Back

From a balanced chemical equation, you can determine the mole ratio of any two substances in the reaction.

Tags

NGSS.HS-PS1-7

Front

What is the relationship between moles and mass?

Back

Mass (grams) = moles x molar mass (grams/mole).

Tags

NGSS.HS-PS1-7

Front

What is the formula to convert grams to moles?

Back

Moles = mass (grams) / molar mass (grams/mole).