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2. What elements are in Na2CO3?

  • 1 sodium, 1 carbon, 1 oxygen
  • 2 sodiums, 3 carbons, 3 oxygens
  • 2 sodiums, 1 carbon, 3 oxygens
  • 2 sodiums, 3 carbons, 1 oxygen

3. What compound is: Silver + Iodine + Oxygen.

  • Sliver Oxydine
  • Silver Iodate
  • Silver Iodine
  • Silver Iodine Oxygen

4. What is the phlogiston theory?

  • When you burn a liquid and it gains mass . It is not true.
  • Every combustible material has phlogiston in. When it is burnt, it loses it.
  • Same as electrolysis.
  • Nothing, it's not true.

5. What elements are in iron sulphate?

  • Oxygen + Iron
  • Iron + Sulphur + Oxygen
  • Iron + Sulphur
  • Iron
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