Front

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

Back

A chemical equation is balanced when the number of atoms of each element is the same on both sides of the equation.

Front

How many atoms of Chlorine are in one molecule of NaCl?

Back

1

Front

What is the chemical formula for water?

Back

H₂O

Front

How many Hydrogen atoms are in one molecule of water (H₂O)?

Back

2

Front

How many Oxygen atoms are in one molecule of carbon dioxide (CO₂)?

Back

2

Front

What is the total number of Oxygen atoms in 3 molecules of CO₂?

Back

6

Front

If an equation has more atoms of an element on one side than the other, is it balanced?

Back

No, it is unbalanced.

Front

How many total atoms are in the compound NaCl?

Back

2 (1 Sodium and 1 Chlorine)

Front

What is the coefficient in front of a chemical formula?

Back

A coefficient indicates the number of molecules or moles of that substance.

Front

In the equation 2H₂ + O₂ → 2H₂O, how many total Hydrogen atoms are present?

Back

4 (2 molecules of H₂ each containing 2 Hydrogen atoms).