<span>This occurs because of their fertilization. They grow there because they need water to carry cells to fertilize them so they can reproduce. They are not fertilized by wind or by bees like other plants, so they need to be in areas where there's a lot of water. This is just how they adapted to there environments.</span>
<span>This problem is solved by the law of effusion, which states that the rate of effusion is ~ 1/sqrt(molecular weight). Calculate the molecular weights of the different gases:
HBr = 80.91 g/mol
NO2 = 46.0055 g/mol
C2H6 = 30.07 g/mol
Thus, the approximate relative rates are HBr ~ 0.112, NO2 = 0.1474 and C2H6 = 0.1824.
Answer: C2H6 effuses fastest.</span>
Food because I know from experience