Which option is an element? a. oxygen

b. sodium chloride

c. air

d. water

What is the ph of a solution that has a hydrogen ion concentration of 1.0 * 10 -9 m?

Now look at the segment of the graph between the two data points marked with black squares. describe how the boiling point and melting point plots behave between these points. be as specific as possible.

Which words or phrases identify layers of groundwater? check all that apply. water table kettle lake saturation zone underground lake sinkhole will give brainiest, answer quickly.