how long will it take 600ml of hydrogen gas to diffuse through a porous partition if 300 ml of oxygen diffuses through it in 10 min under identical conditions

the density(ratio between mass and volume as m/v) decreases from top to bottom in periodic table group as the size increases and nuclear charge decreases. but in periods density increases from left to right as atom size decreases and nuclear charge increases.

the answer is:  

line graphs show patterns in data with variables that change over time; whereas, circle graphs show data as parts out of a whole (such as out of 100%).

points

explanation: