Silicon is used in producing Pv celss because cells made from the crystallized polycrystalline silicon have efficiencies in the range of 14-18% and a moderate price.
Answer: The partial pressure of the water vapor is 1.108 atm
Explanation:
According to Dalton's law, the total pressure of a mixture of gases is the sum of individual pressures exerted by the constituent gases.

Thus 
Given:
=4.015 atm
= 2.907 atm
= ?
Thus 

Thus the partial pressure of the water vapor is 1.108 atm
Answer:
Electrons repel each other due to electrostatic force of attraction between both of them as a result prevent the electron from entering the nucleus preventing it from collapsing
Answer:
I don't even know I'm sorry