If you have a 2M NaCl stock solution, how do you make a 0.5M NaCL dilution?

Atypical human cell is approximately 12.00 μm in diameter and enclosed by a membrane that is 5.000 nm thick. (a) what is the volume of the cell including the membrane? (b) what is the volume of the cell membrane? (c) what percent of the total volume does its membrane occupy? to simplify the calculations, model the cell as a sphere. enter your answers using four significant figures.

Melting glaciers is a serious threat to the environment what is the possible consequence of melting glaciers on polar bears?

When analyzing tree rings, what do scientists assume a thin ring indicates?