Counting atoms and balancing equations

Front

What are coefficients in a chemical equation?

Back

Coefficients are numbers placed in front of the chemical formulas in a balanced equation to indicate the number of molecules or moles of that substance.

Tags

NGSS.MS-PS1-5

Front

Where are coefficients located in a chemical equation?

Back

At the very front of the equation.

Front

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

Back

12

Tags

NGSS.MS-PS1-1

Front

What does it mean for a chemical equation to be balanced?

Back

A balanced equation has the same number of each type of atom on both sides of the equation.

Tags

NGSS.MS-PS1-5

Front

Is the equation 2H₂ + O₂ → 2H₂O balanced?

Back

Yes.

Tags

NGSS.MS-PS1-5

Front

How many total atoms are in the formula 2Al₂(SO₃)₃?

Back

28.

Tags

NGSS.MS-PS1-1

Front

What do subscripts in a chemical formula represent?

Back

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

Tags

NGSS.MS-PS1-1

Front

In the formula C₆H₁₂O₆, how many hydrogen atoms are there?

Back

12.

Tags

NGSS.MS-PS1-1

Front

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

Back

2.

Tags

NGSS.MS-PS1-1

Front

What is the purpose of balancing chemical equations?

Back

To ensure that the law of conservation of mass is followed, meaning the number of atoms of each element is the same on both sides.

Tags

NGSS.MS-PS1-5