RECITATION LECTURE
1. Balance the following equation.
Phosphorus Chloride + Chlorine yields Phosphorus Chloride.
2. In the equation 3H2 + N2 → 2NH3, what are the reactants?
3. In the equation 3H2 + N2 → 2NH3, how many atoms are present in hydrogen in the product side?
4. What is the subscript of hydrogen located in the reactant side in the formula CH4 + O2 → CO2 + H2O?
5. Identify the type of compound in the reactant?
2Fe2O3 + 3C → 3CO2 +4Fe
6. Avogadro’s number is equivalent to _________.
7. The substance formed as a result of a chemical reaction. Usually found at the right side of the equation.
8. Calculate the formula weight or molecular weight of the following compounds then calculate the percentage
composition.
Alumina (Al2O3)
9. Calculate the formula weight or molecular weight of the following compounds then calculate the percentage
composition.
Na2SO4
Write the name of the compound and identify whether it is ionic or covalent compound.
10. SiF4
11. B2H6
12. SF6
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Write the correct chemical formula opposite the name of the compound and indicate the
correct + and – valence electrons.
13. Arsenic oxide
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14. Potassium chlorite
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15. Sodium dichromate
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Balance the following equation:
16. ____ KNO3 + ____ H2CO3  ____ K2CO3 + _____ HNO3
17. ____ BBr3 + ____ HNO3  ____ B(NO3)3 + _____ HBr
18.
____ SeCl6 + ____ O2 
_____ SeO2 + _____ Cl2
19.
_____ Al + ______ HCl  ______ AlCl3 + ______ H2
20.
_____ H3PO4 + ______ HCl  _____ PCl5 + ______ H2O