Answer:
V= 0.147 L
Explanation:
This is simply the application of combined gas law twice, to find the unknowns.
Combined gas law states that: 
P= pressure of air
V= volume of air
n= moles of air
R= Universal gas constant ( 0.08205 L atm mol⁻¹ K⁻¹)
T= Absolute temperature in kelvin.

Now, applying the same gas law at 483K and substituting for n

V= 
V= 0.147 L
Answer:
A
Explanation:
Clear glass reflects light, but frosted glass absorbs light.
I believe the most harmful substance would be element C, this is because element C has a very long half life therefore it has a very slow rate of a decay. Half life of a substance it the time taken for substance to decay to half its original mass or amount.
They have a nucleus and its organelles in common.