Acity planner needs a new method for cleaning a town’s water supply. he hires a scientist to research the issue. because the scientist is being paid by the city planner, her research is not valid.

true

false

in chemistry, a solution’s concentration is how much of a dissolvable substance, known as a solute, is mixed with another substance, called the solvent. the standard formula is c = m/v, where c is the concentration, m is the mass of the solute dissolved, and v is the total volume

c. 4.54 x 10–12 j happens to be correct