Boyle's law balloon was filled to a volume of 2.50 l when the temperature was 30.0∘
c. what would the volume become if the temperature dropped to 11.0∘
c.

To solve this we assume that the gas inside the balloon is an ideal gas. Then, we can use the ideal gas equation which is expressed as PV = nRT. At a constant pressure and number of moles of the gas the ratio T/V is equal to some constant. At another set of condition of temperature, the constant is still the same. Calculations are as follows:

T1 / V1 = T2 / V2

V2 = T2 x V1 / T1

V2 =284.15 x 2.50 / 303.15

V2 = 2.34 L

a and c

c is 100% but i am confused in a

im guessing the west of station b