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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 formula unit mass of ZnO given the atomic mass of:
- Zn = 65 u
- Na = 23 u
- K = 39 u
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- O = 16 u
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(Atomic masses : C = 12 u ; H = 1 u ; O = 16 u)
Calculate the molecular masses of the following compounds :
Methane, CH4
(Atomic masses : C = 12 u ; H = 1 u)
Which of the following elements has the same molecular mass as its atomic mass ?
Calculate the formula masses of the following compounds :
Sodium oxide, Na2O
Calculate the mass of 12.044 × 1025 molecules of oxygen (O2).
If sulphur exists as S8 molecules, calculate the number of moles in 100 g of sulphur. (S = 32 u)
The mass of one molecule of a substance is 4.65 × 10–23 g. What is its molecular mass ? What could this substance be ?
Calculate the relative molecular masses of the following
CHCI3
[At mass : C = 12, H = 1, O = 16, Ci = 35.5, N = 14, Cu = 63.5, S = 32, K = 39, Pt = 195, Ca = 40, P = 31, Mg = 24]
Write the name of the following compound and deduce its molecular mass.
MgCl2
