Chemical Reactions and Stoichiometry

Front

What is a chemical reaction?

Back

A process in which substances (reactants) are transformed into different substances (products) through the breaking and forming of chemical bonds.

Front

What is stoichiometry?

Back

The branch of chemistry that deals with the calculation of reactants and products in chemical reactions.

Front

What is the law of conservation of mass?

Back

In a chemical reaction, mass is neither created nor destroyed; the mass of the reactants equals the mass of the products.

Front

Define molar mass.

Back

The mass of one mole of a substance, typically expressed in grams per mole (g/mol).

Front

What is a mole in chemistry?

Back

A unit that measures the amount of substance, defined as containing exactly 6.022 x 10²³ particles (atoms, molecules, etc.).

Front

How do you balance a chemical equation?

Back

By ensuring that the number of atoms of each element is the same on both sides of the equation.

Front

What is a mole ratio?

Back

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

Front

What is the significance of coefficients in a chemical equation?

Back

Coefficients indicate the number of moles of each reactant and product involved in the reaction.

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 product of a combustion reaction?

Back

Typically produces carbon dioxide (CO₂) and water (H₂O) when a hydrocarbon reacts with oxygen.