Counting atoms and balancing equations

Front

What are coefficients in a chemical equation?

Back

Coefficients are numbers placed in front of the chemical formulas to indicate how many molecules or atoms of each substance are involved in the reaction.

Tags

NGSS.MS-PS1-1

Front

Where are coefficients located in a chemical equation?

Back

At the very front of the equation.

Front

How many atoms are in 2Al₂(SO₄)₃?

Back

28

Tags

NGSS.MS-PS1-1

Front

What do subscripts represent in a chemical formula?

Back

Subscripts indicate how many of that specific element are included in the compound.

Front

How many nitrogen (N) atoms are in (NH₄)₂CrO₄?

Back

2

Tags

NGSS.MS-PS1-1

Front

How many oxygen (O) atoms are in Al₂(SO₄)₃?

Back

12

Tags

NGSS.MS-PS1-1

Front

What is the purpose of balancing a chemical equation?

Back

To ensure that the number of atoms for each element is the same on both sides of the equation.

Tags

NGSS.MS-PS1-5

Front

What does it mean to count atoms in a chemical formula?

Back

Counting atoms involves identifying the number of each type of atom present in a compound based on its chemical formula.

Tags

NGSS.MS-PS1-1

Front

What is a subscript in a chemical formula?

Back

A subscript is a small number written to the right of an element symbol that indicates the number of atoms of that element in a molecule.

Front

What is the total number of atoms in the compound C₆H₁₂O₆?

Back

24 (6 carbon + 12 hydrogen + 6 oxygen = 24 total atoms).

Tags

NGSS.MS-PS1-1