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5 Written questions

5 Matching questions

  1. k-na
  2. single replacement:
  3. Diatomic elements:
  4. one soluble and one insoluble:
  5. Decomposition:
  1. a ab=a+b
  2. b a+bc= b+ac
  3. c they form a 7 on the periodic table: H, N, F,Cl,O,Br,I. all have a 2 at the end
  4. d react with liquid water to produce a base + h2 (oh and h2)
  5. e have a reaction

5 Multiple choice questions

  1. group 1A and ammonium is soluble!
  2. products
  3. this means a catalyst is present!
  4. nitrates and acetates are soluble.
  5. 1) some metallic hydroxides when heated decompose to form a metal oxide + h20
    2) some oxy-acids when heated decompose to form a metal oxide + h20
    3) some metallic carbonates when heated decompose to form a metal oxide + carbon dioxide
    4) some metallic chlorates when heated decompose to form a metal chloride + oxygen gas
    5) most metallic osides are stable but few decompose when heated to form a metal + o gas
    6) some compounds can be decomposed by electricity into their elements.

5 True/False questions

  1. if a yield sign has a triangle on top:this means the reaction is heated!


  2. Synthesis:a+b=ab


  3. In single replacement rxns:they have to do with the electromotive series. it arranges most reacted to least reacted.


  4. law of conservation of mass:matter is neither created nor destroyed!


  5. two soluble reactions:hydrocarbon + o2= co2 + h2o