Answer:
P = 13.5 atm
Explanation:
Given that
No. of moles, n = 20 moles
Volume of nitrogen gas = 36.2 L
Temperature = 25°C = 298 K
We need to find the pressure of the gas. Using the ideal gas equation
PV = nRT
Where
R is gas constant, 
So,

so, the pressure of the gas is equal to 13.5 atm.
Answer:
I took a screen shot of your image, and wrote on top of it!
Explanation:
Hope this helps! :)
As far as I know, the answer is B (breaking a rock)
Reactants are what make up the product.