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प्रश्न
What are ionic and molecular compounds? Give examples.
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उत्तर
Maim Ionic compounds are made up of ions. An ionic compound contains a cation which is a positive ion and an anion which is a negative ion e.g., sodium chloride is an ionic compound made up of Na+ and Cl– ions.
A molecular compound is made up of molecules e.g. ammonia (NH3), carbon dioxide (CO2).
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संबंधित प्रश्न
Calculate the molecular mass of nitric acid, HNO3. (Atomic masses : H = 1 u ; N = 14 u ; O = 16 u)
Calculate the molecular mass of hydrogen bromide (HBr). (Atomic masses : H = 1 u ; Br = 80 u)
Calculate the molecular masses of the following :
Oxygen, O2
(Atomic masses : H = 1 u ; O = 16 u ; Cl = 35.5 u ; N = 14 u ; C = 12 u)
Calculate the molecular masses of the following compounds :
Ethanol, C2H5OH
Calculate the formula masses of the following compounds :
- Calcium chloride
- Sodium carbonate
(Given : Atomic masses : Ca = 40 u ; Cl = 35.5 u ; Na = 23 u ; C = 12 u; O = 16 u)
If sulphur exists as S8 molecules, calculate the number of moles in 100 g of sulphur. (S = 32 u)
Calculate the molecular mass of the following:
(NH2)2CO
Given atomic mass of Cu = 63·5, H = 1, O= 16, C = 12, N = 14, Mg = 24, S = 32
Calculate the weight/mass of an atom of oxygen.
Calculate the weight/mass of an atom of hydrogen.
Write the name of the following compound and deduce its molecular mass.
K2CO3
