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Chemistry : Balancing Chemical Equations


What numbers are needed in the blanks to balance the following chemical equations?
Type these numbers separated by commas with no spaces in the answer.

Example :
Word Equation : Sulfur + Sulfuric acid → Sulfur dioxide + Water
Molecular Equation : _______ S + _______ H2SO4 → _______ SO2 + _______ H2O
Balanced Equation : S + 2 H2SO4 → 3 SO2 + 2 H2O
Answer : 1,2,3,2

Formats Info Page Quiz Review
Fill in the blanks

Your Performance  

1.

_______ PbO2 _______ PbO + _______ O2
 
Hint      

2.

_______ SiO2 + _______ C _______ SiC + _______ CO
 
Hint      

3.

_______ NaOH + _______ SO2 _______ Na2SO3 + _______ H2O
 
Hint      

4.

_______ K + _______ H2O _______ KOH + _______ H2
 
Hint      

5.

_______ NH4Cl + _______ Ca(OH)2 _______ CaCl2 + _______ H2O + _______ NH3
 
Hint      

6.

_______ Fe + _______ O2 _______ Fe2O3
 
Hint      

7.

_______ Na2O + _______ H2O _______ NaOH
 
Hint      


 
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