20 g : 100 g = 1 metre : 500 cm

The solubility of common salt is 36.0 g in 100 g of water at 20^(@) C . If systems I , II and III contains 20.0 , 18.0 "and" 15.0 of the salt added to 50.0 g of water in each case , the vapour pressures would be in the order :

Three masses are placed on the x-axis : 300 g at origin. 500 g at x = 40 cm and 400 g at x = 70 cm . The distance of the centre of mass from the origin is.

The molarity of urea (molar mass 60 g mol^(-1) ) solution by dissolving 15 g of urea in 500 cm^(3) of water is

Particles of masses 1g, 2g, 3g, ……. 100g re kept at the marks 1 cm, 2cm, 3cm,………. 100 cm, respectively on a metre scale. Find the moment of inertia of the system of particle about a perpendicular bisector of the metre scale.