science help?

Question

1.Picturing a sealed container of some solution,the temperature at which the vapor pressure of a liquid equals the pressure of the gas acting on the liquid is the

A.colligative standard
B.freezing point for that solution
C.boiling point for that solution
D.freezing or boiling point for that solution




2.In the compound KCIO 3,what is the percent composition to the nearest whole number of potassium


A.29%
B.32%
C.35%
D39%

Answer 1

1.) C.

2.) KClO3 has 1 potassium atom, 1 chlorine atom, 3 oxygen atoms.
1 K weighs 39
1 Cl weighs 35
1 O weighs 16, so 3 O weighs 48
39 / (39 + 35 + 48) = 39 / 122 = 31.9% (B, solution!)

Answer 2

2.39/39+36+48=39/123=32%

1.Boiling point