Chemical Reactions

Front

What is a chemical reaction?

Back

A process where reactants transform into products, involving the breaking and forming of chemical bonds.

Front

What are reactants in a chemical equation?

Back

Substances that undergo change during a chemical reaction, found on the left side of the equation.

Front

What are products in a chemical equation?

Back

Substances formed as a result of a chemical reaction, found on the right side of the equation.

Front

What does it mean for a chemical equation to be balanced?

Back

A balanced equation has the same number of each type of atom on both sides, indicating conservation of mass.

Front

How do you determine if a chemical equation is balanced?

Back

Count the number of atoms of each element on both sides of the equation and compare.

Front

What is the law of conservation of mass?

Back

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

Front

What is a coefficient in a chemical equation?

Back

A number placed before a compound to indicate how many molecules or moles of that compound are involved in the reaction.

Front

What is a subscript in a chemical formula?

Back

A number written after an element symbol that indicates the number of atoms of that element in a molecule.

Front

How many hydrogen atoms are in 2 HNO3?

Back

There are 6 hydrogen atoms (2 HNO3 contains 2 x 3 = 6 H atoms).

Front

What is the difference between an endothermic and exothermic reaction?

Back

Endothermic reactions absorb heat, while exothermic reactions release heat.