The equation used to calculate the change in freezing point (δtf) of a substance is:
δtf = kfm
where kf is the freezing point depression constant and m is the molality of the solution. which of the statements explains why molality is used instead of molarity in this equation?
a. molality does not appear in many equations, so it is used here to distinguish this equation from other similar ones.
b. as the temperature of a solution changes, its volume will also change, which will affect its molarity but not its molality.
c. in solutions, moles are not directly related to grams and the freezing point of a solution is dependent solely on the number of grams of solute.
d. the equation was originally published with m as a typo, rather than m, but the values are close enough that the equation is still valid.

Does anyone know a lot about how to: - calculate mass of magnesium metal - calculate the actual yield of magnesium oxide - calculate the theoretical yield of mgo - calculate the percent yield of mgo - determine the percent yield of mgo - determine the average percent yield of mgo i had to do an online lab and its asking these questions but i have no idea where to start or how to be able to find these things. i can post the chart of the data from the lab or if you can tell me exactly how i can find each.

What is the relationship between wind and ocean waves? question 17 options: wind moving at higher speeds will transfer more energy to the water, resulting in stronger waves. wind moving at higher speeds will transfer energy over a larger part of the ocean water, resulting in waves with a shorter wavelength. winds moving at higher speeds with cause water to move forward at faster rates, causing larger ocean waves. winds moving at higher speeds will affect deeper water, resulting in waves that move at a faster rate. how do temperature and salinity affect deepwater currents? question 15 options: as temperatures and salinity levels of water increase, the water rises to the surface where it creates currents as it moves to colder regions. they create changes in wind direction, moving denser water in the same direction as the wind and causing the deepwater circulation patterns found in the ocean. they equalize the forces on undersea currents caused by the coriolis effect as they replace more dense water with less dense water. they create density differences that cause dense deepwater currents to flow toward the equator where they displace less dense, warmer water above them.

Which diagram represents the phase tha occurs after a solid melts?