Balance Chemical Equation - Practice

Balance the equation:

Fe + Cl2 = FeCl3

• 2 Fe + 1 Cl₂ = 2 FeCl₃

• 2 Fe + 3 Cl₂ = 2 FeCl₃

• Fe + Cl₂ = 2 FeCl₃

• 2 Fe + 4 Cl₂ = 2 FeCl₃

Balance the equation:

P4 + O2 = P2O3

• 1 P₄ + 6 O₂ = 2 P₂O₃

• 1 P₄ + 2 O₂ = 3 P₂O₃

• P₄ + 3 O₂ = 2 P₂O₃

• P₄ + 3 O₂ = 4 P₂O₃

The numbers needed to balance the equation are:

• 2, 7, 6, 4

• 2, 1, 3, 2

• 1, 1, 3, 2

• 2, 3, 1, 3

Is the following equation balanced?

MgO + __SO₃ --> __MgSO₄

• No

• Yes

Which of the following is incorrect?

• Na3PO4 + 3 KOH = 3 NaOH + K3PO4 $\leftarrow$ Na3PO4 + KOH = NaOH + K3PO4

• N2 + F2 = NF3 $\rightarrow$ 2 N2 + 3 H2 = 2 NH3

• N2 + F2 = NF3 $\rightarrow$ N2 + 3 F2 = 2 NF3

• 2 K + Cl2 = 2 KCl $\leftarrow$ K + Cl2 = KCl