Balancing Chemical Equations # 3

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					                        Balancing Chemical Equations # 3


Balance the equations below.

   1. _____N2 + _____H2 → _____NH3

   2. _____KClO3 → _____KCl + _____O2

   3. _____NaCl + _____F2 → _____NaF + _____Cl2

   4. _____H2 + _____O2 → _____H2O

   5. _____AgNO3 + _____MgCl2 → _____AgCl + _____Mg(NO3)2

   6. _____AlBr3 + _____K2SO4 → _____KBr + _____Al2(SO4)3

   7. _____CH4 + _____O2 → _____CO2 + _____H2O

   8. _____C3H8 + _____O2 → _____CO2 + _____H2O

   9. _____C8H18 + _____O2 → _____CO2 + _____H2O

   10. _____FeCl3 + _____NaOH → _____Fe(OH)3 + _____NaCl

   11. _____P + _____O2 → _____P2O5

   12. _____Na + _____H2O → _____NaOH + _____H2

   13. _____Ag2O → _____Ag + _____O2

   14. _____S8 + _____O2 → _____SO3

   15. _____CO2 + _____H2O → _____C6H12O6 + _____O2

   16. _____K + _____MgBr2 → _____KBr + _____Mg

   17. _____HCl + _____ CaCO3  _____CaCl2 + _____ H2O + ______CO2

   18. _____H2O + _____O2  ______H2O2

   19. _____NaBr + _____CaF2  ____ NaF + ______CaBr2

   20. _____ H2SO4 + _____ NaNO2  _____ HNO2 + _____ Na2SO4
                                  Balancing Equations

1.      ________ may be changed to balance an equation.
        a. subscripts      b. coefficients       c. reactants              d. products

2.      In the reaction CH4 + 2 O2  CO2 + 2H2O, oxygen (O2) is a
        ____________.
        a. subscript        b. coefficient   c. reactant          d. product

3.      In the equation C3H 8+ 5 O2  3 CO2 + 4 H2O, the coefficient for oxygen (O2) is
        _____.
        a. 5                  b.     3            c.      4               d.     8

4.      In the equation C3H 8+ 5 O2  3 CO2 + 4 H2O, the subscript for oxygen (O2) is
        _____.
        a. 5                  b.     3            c.      2              d.     8

5.      A coefficient of _____ should be placed before CO in order to balanced the
        equation:
                              C + CO2  CO

        a. 2                 b.      3             c.      4               d.     6


Balance the following equations by placing coefficients where necessary:


     6. _____ Na + _____ HCl  _____ NaCl + _____ H2


     7. _____ K + _____ H2O  _____ KOH + _____ H2


     8. _____ CaO + ____ P4O10  _____ Ca3(PO4)2


     9. _____ C2H6 + _____ O2  _____ CO2 + _____ H2O


     10. _____ Cu + _____ H2SO4  _____ CuSO4 + _____ SO2 + _____ H2O

				
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