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प्रश्न
Define 'molecular mass' of a substance.
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उत्तर
The molecular mass of a substance is the relative mass of its one molecule as compared with a `""^12""_6C` atom. The mass of an atom of is `""^12""_6C` considered to be 12 a.m.u.
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संबंधित प्रश्न
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 :
Chlorine, Cl2
(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 :
Ethene, C2H4
(Atomic masses : C = 12 u ; H = 1 u)
Calculate the molecular masses of the following compounds :
Ethyne, C2H2
(Atomic masses : C = 12 u ; H = 1 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)
A gas cylinder of capacity of 20 dm3 is filled with gas X the mass of which is 10 g. When the same cylinder is filled with hydrogen gas at the same temperature and pressure the mass of the hydrogen is 2 g, hence the relative molecular mass of the gas is ______.
The gram molecular mass of oxygen molecule is ______.
Write the name of the following compound and deduce its molecular mass.
MgCl2
A gas occupied 360 cm3 at 87°C and 380 mm Hg pressure. If the mass of gas is 0.546 g, find its relative molecular mass.
