When defining concentration during diffusion, what exactly are we
describing?
A. focus of a solvent
B. mass/volume of a solute
C. the mass of a solvent
D. the same equilibrium throughout a system

letteer c the mass of a solvent

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Explanation:

true is the answer : )

the "power" of a lens is its resolution power, or its ability to distinguish between to closely located points. with the low power lens, it is likely you will see the rough form of the hay and maybe some movement of dots around the hay. however, when observed with the high power lens, the detailed features of the hay become visible and the microbes being grown are more clearly visible.

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