Answer:
d. steam-water equilibrium at 373 K
Step-by-step explanation:
At one atmospheric pressure , the boiling point of water is 100°C or 273+100 = 373 K in kelvin temperature scale.
so at this temperature vapor pressure of water and steam are in equilibrium .
A third are spotted so that would mean 2/3 are not spotted so if you take 1200 divide it by 3 and then multiply it by 2 you get 800 which is your answer
f(x) cannot be 0 or less than zero, but can approach+ infinity
Answer is (0, ∞)