Counting Atoms & Balancing Equations

Front

How many Nitrogen atoms are in the compound H₃C₂ON₅?

Back

There are 5 Nitrogen atoms in H₃C₂ON₅.

Front

What is a coefficient in a chemical equation?

Back

A coefficient is a number written in front of a chemical formula that indicates how many molecules or atoms of that substance are involved in the reaction.

Front

Provide an example of a balanced chemical equation.

Back

An example of a balanced chemical equation is: 2H₂ + O₂ -> 2H₂O.

Front

How do you balance the equation: ___ Mg + ___ O₂ → ___ MgO?

Back

The balanced equation is: 2 Mg + 1 O₂ → 2 MgO.

Front

What do the red numbers in a chemical equation represent?

Back

The red numbers represent coefficients.

Front

What is the law of conservation of mass in relation to chemical equations?

Back

The law of conservation of mass states that mass is neither created nor destroyed in a chemical reaction; therefore, the number of atoms of each element must be the same on both sides of the equation.

Front

What is the purpose of balancing chemical equations?

Back

The purpose of balancing chemical equations is to ensure that the same number of each type of atom is present on both sides of the equation, reflecting the conservation of mass.

Front

What is a subscript in a chemical formula?

Back

A subscript is a number written below and to the right of a chemical symbol that indicates the number of atoms of that element in a molecule.

Front

How do you identify the reactants and products in a chemical equation?

Back

Reactants are the substances that undergo a chemical change, found on the left side of the equation, while products are the substances formed as a result of the reaction, found on the right side.

Front

What is the difference between a balanced and unbalanced chemical equation?

Back

A balanced chemical equation has equal numbers of each type of atom on both sides, while an unbalanced equation does not.