Balancing Equations Review

Front

Balance this equation:
MgCl₂ --> Mg₄+ Cl₂

Back

4MgCl₂ --> Mg₄+ 4Cl₂

Front

The substances listed on the left side of a chemical equation are the

Back

Reactants

Front

How many Hydrogen (H) atoms are in NH₃O5?

Back

3

Front

Which number should go in the blank?
_ H₂ + O₂ -> 2 H₂O

Back

2

Front

Is the following equation balanced or unbalanced?
N₂ +3 H₂ --> 2NH₃

Back

Balanced

Front

How many hydrogens are in 4H₂O?

Back

8

Front

How many atoms of aluminum are on each side of the following equation: 4Al + 3O₂--> 2Al₂O₃?

Back

4

Front

Coefficients to balance: Ag₂O → Ag + O₂

Back

2,4,1

Front

Which problem is balanced?
Options:
1. PbO₂ + 2H₂ --> H₂SO₄
2. SO₂ + H₂O --> H₂SO₄
3. 2Na + 2H₂O --> 2NaOH + H₂
4. 2Na + 2H₂O --> 2NaOH + H

Back

2Na + 2H₂O --> 2NaOH + H₂

Front

Coefficient

Back

The large number to the left of a formula.