Write the lewis dot structure of the following:
O₃, COCl₂

The rate of diffusion of gas is _______ proportional to both ________ and square root of molecular mass.

The average velocity of an ideal gas molecule at 27^oC is 0.3m/sec. The average velocity at 927^oC will be

The softness of group I-A metals increases down the group with increasing atomic number.