Question

A mixture of so2 and o2 in the molar ratio 16:1 is diffused through a pin hole for successive effusions three times to give a molar ratio 1:1 of diffused mixture

Answer 1

what is the volume of water to be added to 200 ml of 18 molar H2 S o4 solution to get 18 1.8 molar H2 S o4 solution?

98% by weight means 98 gm H2SO4 in 100 gm solution or 98 g H2SO4 in 2 g water.

5.5 [0.1×1000/ 18] So the required volume is 5.5 ml.