write any 20 formula of substances
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MgO ---- Magnesium Oxide
O3 ---- Ozone
HCl --- Hydrogen chloride
H2SO4 ------ Hydrogen sulphate
MgCl2 ------- Magnesium Chloride
CaCO3 ---- Calcium carbonate
CaSO4 ------ Calcium sulphate
CO2 ----- Carbon dioxide
CO --- Carbon monoxide
NH3 ----- Ammonia
CaOCl2 ------ Calcium oxy-chloride
NaOH ------- Sodium hydroxide
NaCl ----- Sodium Chloride
CCl4 --- Carbon tetrachloride
Na2ZnO2 ------- sodium zincate
HCHO ---- Methanal
CH4 ----- Methane
C2H5OH ----- Ethanol
CH3COOH ---- Ethanoic Acid
HCOOH ---- Methanoic Acid
AgBr ---- Silver bromide
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