Its a formula relating to specific heat capacity
Δθ refers to the change in temperature
Q refers to the energy neededto raise the temperature of an object by the change in temperature
m stands for the mass of tje object
c is the specific heat capacity which is the amount of energy needed to heat up an object per unit mass
        
             
        
        
        
A cold air mass moves into an area of warm air
        
             
        
        
        
You can solve this by using the equation (P1V1/T1) = (P2V2/T2). Plug in 0.50 atm for P1, leave V1 as the unknown, and plug in 325 K as T1. Then substitute 1.2 atm for P2, 48 L for V2, and 320 K for T2. Solve for V1, which is 117L, but since you round using two sig figs, your answer is C, 120 L. Hope this helps!
        
             
        
        
        
How does the law of conservation of mass apply  to this reaction: C2H4 + O2 → H2O + CO2?
 
        
             
        
        
        
Colligative
properties calculations are used for this type of problem. Calculations are as
follows:<span>
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<span>ΔT(freezing point)
 = (Kf)m
ΔT(freezing point)
 = 1.86 °C kg / mol (0.705)
ΔT(freezing point)  = 1.3113 °C
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<span>Hope this answers the question. Have a nice day.</span>