Stoichiometry mole & mass

Front

What is a mole?

Back

A mole is a unit of measurement in chemistry that represents 6.022 x 10^23 particles (atoms, molecules, ions, etc.).

Front

What is Avogadro's number?

Back

Avogadro's number is 6.022 x 10^23, which is the number of particles in one mole of a substance.

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).

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 balanced equation for the reaction of magnesium with hydrochloric acid?

Back

Mg + 2 HCl -> MgCl2 + H2.

Front

How do you determine the mass of a product from moles in a chemical reaction?

Back

Mass of product (g) = moles of product x molar mass of product (g/mol).

Front

What is the mole ratio in a balanced chemical equation?

Back

The mole ratio is the ratio of moles of one substance to moles of another substance in a balanced equation.

Front

What is the mole ratio of H2O to H3PO4 in the reaction P4O10 + 6 H2O -> 4 H3PO4?

Back

The mole ratio is 6:4.

Front

How do you convert grams to moles?

Back

Moles = mass (g) / molar mass (g/mol).

Front

What is the significance of a balanced chemical equation?

Back

A balanced chemical equation shows the conservation of mass, indicating that the number of atoms of each element is the same on both sides of the equation.