# Balancing Equations - Quiz - gcsescience.com.

 1. In the formula KCl there area) 1 potassium and 2 chlorines b) 2 potassiums and 1 chlorine c) 1 potassium and 1 chlorine d) 2 potassiums and 2 chlorines
 2. The balanced equation for the reaction       of potassium with chlorine isa) K + Cl > KCl b) K + Cl2 > KCl2 c) K + Cl2 > 2KCl d) 2K + Cl2 > 2KCl
 3. In the formula MgBr2 there area) 2 magnesiums and 2 bromines b) 1 magnesium and 2 bromines c) 2 magnesiums and 1 bromine d) 1 magnesium and 1 bromine
 4. The balanced equation for the reaction       of magnesium with bromine isa) Mg + Br > MgBr2 b) Mg + Br2 > MgBr2 c) 2Mg + 2Br > MgBr2 d) 2Mg + Br > MgBr2
 5. In the formula Na2O there area) 2 sodiums and 1 oxygen b) 2 sodiums and 2 oxygens c) 1 sodium and 1 oxygen d) 1 sodium and 2 oxygens
 6. The balanced equation for the reaction       of sodium with oxygen isa) 2Na + O2 > Na2O b) 2Na + O > Na2O c) 4Na + O2 > 2Na2O d) Na + O2 > Na2O
 7. The balanced equation for the reactionof iron oxide with carbon monoxide (in the blast furnace) isa) Fe2O3 + 2CO > Fe + CO2 b) Fe2O3 + 2CO > 2Fe + 2CO2 c) Fe2O3 + 3CO > 2Fe + 3CO2 d) 2Fe2O3 + 4CO > 3Fe + 4CO2

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