Mole Conversion Review

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

How do you convert moles to grams?

Back

To convert moles to grams, multiply the number of moles by the molar mass of the substance (in g/mol). Formula: grams = moles × molar mass.

Front

What is the molar mass of a compound?

Back

The molar mass of a compound is the mass of one mole of that compound, calculated by summing the atomic masses of all the atoms in its molecular formula.

Front

What is the formula to calculate the number of moles from grams?

Back

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

Front

What is the mole ratio in a chemical reaction?

Back

The mole ratio is the ratio of moles of one substance to moles of another substance in a balanced chemical equation, used to convert between moles of reactants and products.

Front

How do you find the molar mass of (NH4)2CO3?

Back

To find the molar mass of (NH4)2CO3, calculate: (2 × 14.01) + (8 × 1.01) + (12.01) + (3 × 16.00) = 96.1 g/mol.

Front

What is the balanced equation for the combustion of B2H6?

Back

The balanced equation for the combustion of B2H6 is: B2H6 + 3O2 → 2HBO2 + 2H2O.

Front

How do you determine the mass of a reactant needed in a reaction?

Back

To determine the mass of a reactant needed, use the mole ratio from the balanced equation and the molar mass of the reactant.

Front

What is the significance of the molar mass in stoichiometry?

Back

The molar mass is crucial in stoichiometry as it allows for the conversion between mass and moles, enabling calculations of reactants and products in chemical reactions.

Front

What is the mass of 0.89 mol of CaCl2?

Back

The mass of 0.89 mol of CaCl2 is 98.9 grams.