Which TWO substances are among the six most abundant elements in living things? A. Fluorine
B. Carbon
C. Hydrogen
D. Sodium

The molality of calcium chloride (cacl2) in an aqueous solution is 2.46 m. what is mole fraction of the solute?

Kp is the equilibrium constant for dissociation of the propionic acid dimer. what is the sign of the slope for a plot of the natural logarithm of kp vs. inverse temperature for this reaction?

How much carbon is stored in the atmosphere as co2