Balancing equations

Front

What is the process of balancing chemical equations?

Back

The process of ensuring that the number of atoms for each element is the same on both sides of a chemical equation.

Tags

NGSS.MS-PS1-5

Front

What does the Law of Conservation of Mass state?

Back

Matter cannot be gained or lost in a chemical reaction.

Tags

NGSS.MS-PS1-5

Front

What is a coefficient in a chemical equation?

Back

A number placed in front of a chemical formula to indicate how many molecules or moles of that substance are involved in the reaction.

Tags

NGSS.MS-PS1-1

NGSS.MS-PS1-5

Front

What is a reactant?

Back

A substance that undergoes a chemical change in a reaction.

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

Front

What is a product in a chemical reaction?

Back

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

Tags

NGSS.MS-PS1-5

Front

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

Back

Count the number of atoms represented by the subscripts in the chemical formula.

Tags

NGSS.MS-PS1-1

Front

What is the difference between a coefficient and a subscript?

Back

A coefficient indicates the number of molecules, while a subscript indicates the number of atoms in a molecule.

Front

Balance the equation: _C + _O2 -> _CO2

Back

1, 1, 1

Tags

NGSS.MS-PS1-5

Front

What is the balanced equation for the combustion of propane (C3H8)?

Back

C3H8 + 5O2 -> 3CO2 + 4H2O

Tags

NGSS.HS-PS1-7

Front

How many hydrogen atoms are in the balanced equation: 2H2 + O2 -> 2H2O?

Back

4 hydrogen atoms.

Tags

NGSS.MS-PS1-1