Chemical Equations Review

Front

What is a chemical equation?

Back

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

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, adhering to the Law of Conservation of Matter.

Front

What is the Law of Conservation of Matter?

Back

The Law of Conservation of Matter states that matter cannot be created or destroyed in a chemical reaction; it only rearranges.

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 assumed to be one.

Front

What is the difference between an element and a compound?

Back

An element is a pure substance made of only one type of atom, while a compound is made of two or more different types of atoms chemically bonded together.

Front

What is the chemical formula for water?

Back

H₂O.

Front

How many hydrogen atoms are in H₂O?

Back

2 hydrogen atoms.

Front

What is a reactant in a chemical equation?

Back

A reactant is a substance that undergoes a chemical change in a reaction.

Front

What is a product in a chemical equation?

Back

A product is a substance that is formed as a result of a chemical reaction.

Front

What does it mean to balance a chemical equation?

Back

To balance a chemical equation means to adjust the coefficients in front of the reactants and products so that the number of atoms of each element is the same on both sides.