Reduction is the process by which eletrons are gained by an atom. 
        
             
        
        
        
Answer:
Explanation:
We shall apply gas law formula 
P₁ V₁ / T₁ = P₂V₂ / T₂
.914  x 350 / ( 273 + 22.7 ) = 1 x 220 / T₂
1.0818 = 220 / T₂
T₂ = 203.36 K 
= - 69.64 ⁰ C 
 
        
             
        
        
        
Density increases with the temperature, true.
        
                    
             
        
        
        
I am pretty sure that <span>If I were asked to compare matter in solid, liquid, and gaseous states, the statement which would best defined a gas is </span>highest energy, highest molecular motion, and least dense packaging of molecules. I choose this one because it's not sensible to <span>heat CO2 (in case of safety) and in the last option the amount of energy is not satisfying.
Hope it helps!</span>
        
                    
             
        
        
        
Control rods are used<span> in </span>nuclear<span> reactors to </span>control<span> the fission rate of uranium and plutonium. They are composed of chemical elements such as boron, silver, indium and cadmium that are capable of absorbing many neutrons without themselves fissioning.</span>