Balancing chemical equations

Front

What is a balanced chemical equation?

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 during the reaction.

Tags

NGSS.MS-PS1-5

Front

How do you balance a chemical equation?

Back

To balance a chemical equation, adjust the coefficients (the numbers in front of the compounds) to ensure that the number of atoms of each element is the same on both sides.

Tags

NGSS.HS-PS1-7

Front

What is the law of conservation of mass?

Back

The law of conservation of mass states that mass cannot be created or destroyed in a chemical reaction; it can only change forms.

Tags

NGSS.MS-PS1-5

Front

What does the coefficient in a chemical equation represent?

Back

The coefficient represents the number of molecules or moles of a substance involved in the reaction.

Tags

NGSS.MS-PS1-5

Front

Balance the equation: H2 + O2 -> H2O

Back

2H2 + O2 -> 2H2O

Tags

NGSS.MS-PS1-5

Front

What is the purpose of balancing chemical equations?

Back

The purpose is to ensure that the same number of atoms of each element are present before and after the reaction, reflecting the conservation of mass.

Tags

NGSS.MS-PS1-5

Front

How many oxygen atoms are in 3H2O?

Back

There are 3 oxygen atoms in 3H2O.

Tags

NGSS.MS-PS1-1

Front

Is the equation 2Na + Cl2 -> 2NaCl balanced?

Back

YES

Tags

NGSS.MS-PS1-5

Front

Balance the equation: C3H8 + O2 -> CO2 + H2O

Back

C3H8 + 5O2 -> 3CO2 + 4H2O

Tags

NGSS.MS-PS1-5

Front

What is a reactant in a chemical reaction?

Back

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

Tags

NGSS.MS-PS1-5