Determine the frequency in Hz if the wavelength of a light wave is 765nm. (Note: speed of light in vacuum (c) is 3.0 x108 m/s or 3.0 x 10^8m/s or 3.0 E8 m/s and
1m = 1x109 nm) [3]

hey there!

boiling point is the temperature at which the vapor pressure of the liquid equals atmospheric pressure. the vapor pressure of solvent molecules is decreased when a solute is added, so a higher temperature is required to increase the number of solvent molecules in the gas phase above the liquid.

at the freezing point, the vapor pressures of the solid and liquid are equal; a lower temperature is needed to reduce the number of solvent particles above the liquid.

hope this you

tobey

i believe you are right for all except the 3rd ( look at sqdancefan his answer is much better)