Unit 05 Review

Front

What is mass directly related to?

Back

Amount of matter.

Front

Balance the equation: Li + N₂ → ?

Back

Li₃N (Coefficient on lithium nitride is 2).

Front

Is the reaction 3C + 2O₂ → 3CO₂ balanced?

Back

No.

Front

Is the reaction I₂ + Na → 2NaI balanced?

Back

No.

Front

Is the reaction 2Fe + 3O₂ → 2Fe₂O₃ balanced?

Back

No.

Front

What is the law of conservation of mass?

Back

Mass is neither created nor destroyed in a chemical reaction.

Front

Define a balanced chemical equation.

Back

A chemical equation where the number of atoms for each element is the same on both sides.

Front

What is a coefficient in a chemical equation?

Back

A number placed in front of a chemical formula to indicate how many molecules are involved.

Front

What does it mean for a reaction to be unbalanced?

Back

The number of atoms of one or more elements is not the same on both sides of the equation.

Front

How do you determine if a chemical equation is balanced?

Back

Count the number of atoms of each element on both sides of the equation.