Please help with C and D, i keep getting them wrong.

For C, i tried 0.1939, and it was wrong. For D i tried 1.939x10^3 ppm, and it was wrong.

A 2.100102M solution of glycerol (C3H8O3) in water is at 20.0C. The sample was created by dissolving a sample of Chemists often use molarity M, in moles/liter, to C3H8O3 in water and then bringing the volume up to 1.000L. It was determined that the volume of water needed to do this measure the concentration of solutions. Molarity is was 999.1mL. The density of water at 20.0C is 0.9982g/mL. a common unit of concentration because the volume of a liquid is very easy to measure. However, the drawback of using molarity is that Part A volume is a temperature-dependent quantity. As temperature changes, density changes, which affects volume. Volume markings for most laboratory glassware are calibrated for room Calculate the molality of the glycerol solution. temperature, about 20C. Fortunately, there are Express your answer to four significant figures and include the appropriate units. several other ways of expressing concentration that do not involve volume and are therefore temperature independent. Calculate the mole fraction of glycerol in this solution. Express the mole fraction to four significant figures. Calculate the concentration of the glycerol solution in percent by mass. Express your answer to four significant figures and include the appropriate units. Calculate the concentration of the glycerol solution in parts per million by mass. Express your answer as an integer to four significant figures and include the appropriate units