Which of the following is a method of purifying water? a. aeration b. combustion c. fixation d. freezing

Describe the difference between a. a hypothesis and a theory and b. an observation and an experiment.

How many mmols of tris-hcl are there in 100 ml of a 100 mm tris-hcl buffer solution at ph 8.1? note that the 100 mm refers to the sum of tris and tris-hcl concentrations?

There are approximately 15 milliliters (ml) in 1 tablespoon (tbsp). what expression can be used to find the approximate number of milliliters in 3 tbsp?