Answer/Explanation:
A) The independent(test) variable controls the dependent variable. A good way to think about this is that the independent variable has nothing that effects itself. The dependent variable is 'dependent' or reliant on the independent variable.
Answer:

Explanation:
From the question we are told that:
Initial volume 
Final Volume
Work 
Temperature 
Generally the equation for Ideal gas is mathematically given by




Explanation:
A freezing point is defined as the point in which a liquid state of a substance changes into solid state.
Whereas boiling point is defined as the point at which liquid state of substance starts to convert into vapor state.
So, a substance is freezing at
and boils at
then it means at room temperature, that is, around
the substance is present in liquid state.
This is because between the freezing and boiling point a substance will always exist in liquid state.
Thus, we can conclude that state of the material at room temperature is liquid.
I think i’ll say the answer is 6 mol b