Chemical Equations

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 do the coefficients in a chemical equation represent?

Back

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

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; the total mass of reactants equals the total mass of products.

Front

How do you determine the number of atoms in a compound?

Back

Count the number of atoms of each element in the chemical formula, using subscripts to indicate the quantity.

Front

What is a reactant in a chemical equation?

Back

A reactant is a substance that undergoes a chemical change in a reaction, found on the left side of the equation.

Front

What is a product in a chemical equation?

Back

A product is a substance formed as a result of a chemical reaction, found on the right side of the equation.

Front

How many oxygen atoms are in 2H2O?

Back

There are 2 oxygen atoms in 2H2O.

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 does the subscript in a chemical formula indicate?

Back

A subscript indicates the number of atoms of the element in a molecule.

Front

How many sodium (Na) atoms are in 4NaCl?

Back

There are 4 sodium (Na) atoms in 4NaCl.