Nitrogen is a gas because it is an airlike fluid substance which expands freely to fill any space available, irrespective of it's quantity
Answer: The density of kerosene is 
Explanation:
Density is defined as the mass contained per unit volume.
Given : Mass of kerosene = mass of beaker with kerosene - mass of empty beaker = 60 g - 20 g = 40 g
Volume of kersone =
Putting in the values we get:
Thus the density of kerosene is 
1 cg ---------- 0.1 dg
457 cg ------- ?
457 x 0.1 / 1
= 45.7 dg