Pre-laboratory question balance each of the following equations, and classify each of the reactions by type. reaction equation type of reaction 1. kclo3 → kcl + o2 2. na + o2 → na2o2 3. ki + pb(no3)2 → kno3 + pbi2 4. cu + agno3 → cu(no3)2 + ag 5. c3h8 + o2 → co2 + h2o + heat 6. zn + hcl → zncl2 + h2

1) 2 KClO₃ → 2 KCl + 3 O₂ decomposition

2) 2 Na + O₂ → Na₂O₂ direct combination

3) 2 KI + Pb(NO₃)₂ → 2 KNO₃ + PbI₂ double displacement

4) Cu + 2 AgNO₃ → Cu(NO₃)₂ + 2 Ag single displacement

5) C₃H₈ + 5 O₂ → 3 CO₂ + 4 H₂O + heat  combustion

6) Zn + 2HCl → ZnCl₂ + H₂ single displacement

decomposition reaction -  when you heat a compound (for a certain amount of time and temperature) it will transform in simpler substances

direct combination - simpler elements will react to each other to form a chemical compound

double replacement - it is a reaction of the following type

AB + CD →  AC + BD

single replacement - it is a reaction of the following type

A + BC →  B + AC

combustion - when substances (usually organic compounds like hydrocarbons) react with oxygen forming oxides and heat

the answer is: they rebelled against saddam hussein’s rule.

kurds opposed saddam rule and wanted independence. kurds in the north and shiites in the south revolt against hussein.

for example, the halabja attack in 1988 conducted against the kurdish people by the iraqi regime under saddam hussein, where between 4000 people are killed and around 9000 are injured.