The number of molecules per unit volume in a gas is _______ compared to solids and liquids.
Much higher
Much lower
Moderat
Moderatly high
The number of molecules per unit volume of a gas is much lower as compared to solids and liquids. therefore, gases have very low densities.
Give reasons for the following: (a) all temperatures in the absolute (Kelving) scale are in positive figures. (b) Gases have lower density compared to that of solids or liquids. (c) Gases exert pressure in all directions. (d) It is necessary to specify the pressure and temperature of a gas while stating its volume. (e) inflating a balloon seems to violate Boyle's law. (f) Mountaineers carry oxygen cylinders with theml. (g) gas fills completely the vessel in which it is kept.