Balancing Chemical Equations

Front

What does the Law of Conservation of Mass state?

Back

Matter cannot be gained or lost in a chemical reaction.

Front

What is the left part of a chemical equation called?
2H_{2 +} O₂ --> 2H₂O

Back

Reactants

Front

What is the right part of a chemical equation called?
2H_{2 +} O₂ --> 2H₂O

Back

Products

Front

Total number of atoms in 5Na₃PO₄

Back

40

Front

What is the little number after an element in a chemical equation called? Example: H₂

Back

Subscript

Front

Is the following equation balanced?
Al + O₂ --> 2Al₂O₃

Back

No

Front

Is the following equation balanced?
2C₂H₂ + 5O₂ --> 4CO₂ + 2H₂O

Back

yes

Front

Which of the following equations are correctly balanced? Options: 12CO₂ +H₂O --> C₆H₁₂O₆ + O₂, CO₂ + 9H₂O --> C₆H₁₂O₆ + O₂, CO₂ + H₂O --> 3C₆H₁₂O₆ + O₂, 6CO₂ + 6H₂O --> C₆H₁₂O₆ + 6O₂

Back

6CO₂ + 6H₂O --> C₆H₁₂O₆ + 6O₂

Front

Is the following reaction balanced?
NaHCO₃ --> Na₂CO₃ + H₂O + CO₂

Back

no

Front

Balance the following equation: ___ H₂+ ___ O₂→___ H₂O

Back

2, 1, 2