Chemical Reactions review spring 2024

Front

What are reactants in a chemical reaction?

Back

Reactants are the substances that undergo a chemical change in a reaction, found on the left side of a chemical equation.

Front

What are products in a chemical reaction?

Back

Products are the substances that are formed as a result of a chemical reaction, located on the right side of a chemical equation.

Front

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

Back

A balanced chemical equation has the same number of each type of atom on both sides of the equation, indicating that mass is conserved.

Front

How do you determine the number of atoms in a chemical formula?

Back

Count the subscripts in the formula; if there is no subscript, it is understood to be 1.

Front

In the equation 2Mg + O2 -> 2MgO, how many magnesium (Mg) atoms are present in the reactants?

Back

There are 2 magnesium (Mg) atoms in the reactants.

Front

In the equation 2Mg + O2 -> 2MgO, how many oxygen (O) atoms are present in the products?

Back

There are 2 oxygen (O) atoms in the products.

Front

What is the law of conservation of mass?

Back

The law of conservation of mass states that mass is neither created nor destroyed in a chemical reaction.

Front

What is a chemical equation?

Back

A chemical equation is a symbolic representation of a chemical reaction, showing the reactants and products.

Front

What is the significance of coefficients in a chemical equation?

Back

Coefficients indicate the number of molecules or moles of a substance involved in the reaction.

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, indicating the number of atoms of that element in a molecule.