If it takes 15 s for a certain sample of neon to effuse through a porous barrier, how much time will it take for the same amount of nitrogen gas to effuse through the barrier under the same conditions? 1. greater than 15 s 2. less than 15 s 3. 15 s

The correct answer is;

2. less than 15 s

Explanation:

Grahams law of effusion states

Therefore

we have molar mass of neon gas = 20.18 g/mol

Molar mass of nitrogen gas = 28.014 g/mol

Which gives

= 0.72

Therefore the rate of effusion of nitrogen gas is 0.72*15 = 12.73 s which is less than 15 s

well in order to answer this question you have to provide more information < 3

in chemistry, adhesion and cohesion are attractive forces that exist between molecules. they hold the molecules together from each other. they are different in that adhesive force exists between molecules of different substance while cohesive force happens between molecules of same substance.

adhesion between water and glass causes water molecules at the edge of water and glass interface to climb up the wall in a narrow glass tube. this is called capillary action. cohesion is what gives glass its shape and causes water to form a droplet.