Unit 4 Benchmark #2 - Balancing Equations (Version B)

Gap-fill exercise

Fill in all the gaps, then press "Check" to check your answers. Use the "Hint" button to get a free letter if an answer is giving you trouble. You can also click on the "[?]" button to get a clue. Note that you will lose points if you ask for hints or clues!
1.       H2 + Cl2 → HCl

2.       Ca + O2 → CaO

3.       Cu + S8 → CuS

4.       Al + O2 → Al2O3

5.       MgCO3 → MgO + CO2

6.       Ni(ClO3)2 → NiCl2 + O2

7.       H2SO4 → H2O + SO3

8.       Ag2O → Ag + O2

9.       Mg + HNO3 → Mg(NO3)2 + H2

10.       K + H2O → KOH + H2

11.       Ca + HCl → CaCl2 + H2

12.       CuSO4 + Zn → ZnSO4 + Cu

13.       HCl + NaOH → NaCl + H2O

14.       CaS + HCl → CaCl2 + H2S

15.       FeS + HCl → FeCl2 + H2S

16.       KOH + H2SO4 → K2SO4 + H2O

17.       C4H10 + O2 → CO2 + H2O

18.       C5H12 + O2 → CO2 + H2O

19.       C6H14 + O2 → CO2 + H2O

20.       C2H4 + O2 → CO2 + H2O