What is always true of a weak acid? O A. It has been diluted with water.
B. It only partially dissociates in solution.
C. It does not dissolve in water.
D. It contributes only one proton.

Mary is conducting an experiment on how pollution affects plant growth. how can she ensure that her data are reliable?

What amount of heat is exchanged when 106.2 grams of substance y goes from a liquid at 35 degrees celsius to a solid at the same temperature? melting point of substance y = 35 degrees c; δhvaporization = 3.67 j/mol; δhfusion = 3.30 j/mol. mwsubstance y = 28.22 g/mol. −12.4 j −3.51 x 102 j 1.24 x 101 j 351 j

Which change to the system wood cause the freely-moving piston to lower?