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Question

write the molecular formulae of the compound formed by the following set of elements

  1. calcium & flourine
  2. hydrigen &sulphur
  3. nitrogen &hydrogen
  4. carbon &clorine
  5. sodium &oxygen
  6. carbon &oxygen

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Solution

1. Calcium + Fluorine: Calcium fluoride

Ca + F2 ----------------> CaF2

2. Hydrogen + Sulphur: Hydrogen sulphide

2H + S -------------------> H2S

3. Nitrogen and Hydrogen : Ammonia

N2 + 3H2 ----------------> 2NH3

4. Carbon and Chlorine: Carbon tetrachloride

C + 4Cl ------------------> CCl4

5. Sodium and Oxygen: Sodium oxide

4Na + 2O2 ----------------> 2Na2O

6. Carbon and oxygen: Carbon dioxide

C + O2 ---------------------> CO2


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