Answer:
He
Explanation:
From Graham's law of diffusion, lighter or less dense gas tends to diffuse faster than denser gas amongst the list, He is the lightest gas and so will diffuse faster
Answer:
2.4506 x 
Explanation:
move decimal point to the right 1 time : 24506
24506 becomes 2.4506
count how many numbers after decimal point and that becomes b
b = 4
Answer:
New predators and not a lot of food
Explanation:
If new predators come than they can eat the insects and go extinct. Also if there is not a lot if food than the will die because they have nothing to eat.