Acid Rain. Hope i helped you!
Here's a website with the answer and some cool reading:
http://history-world.org/archeology.htm
A - 12
The amount of protons in a specific element do not change, for if the protons change, then the element themselves change. Therefore, no matter what, if the question specifies the element (i.e. Carbon) then the amount of protons will remain the same as seen on the periodic table.
Hope this helps!
Answer : The partial pressure of X and Y gases are, 0.525 and 1.575 atm respectively.
Explanation : Given,
Moles of X = 2.0 mole
Moles of Y = 6.0 mole
Total pressure = 2.1 atm
Now we have to calculate the mole fraction of X and Y.


and,


Now we have to calculate the partial pressure of X and Y.
According to the Raoult's law,

where,
= partial pressure of gas
= total pressure of gas = 2.1 atm
= mole fraction of gas


and,


Thus, the partial pressure of X and Y gases are, 0.525 and 1.575 atm respectively.