Equally soluble in a variety of organic solvents (bottles labeled A, B, C). If the student needs the aqueous layer to be the bottom layer in the separatory funnel, what piece of information is most critical for making the solvent selection?

The piece of information that is most critical for making the solvent selection is that the organic solvent must be less dense than the aqueous solution

Explanation: separatory funnel is a type of separation technique that is used in a chemistry laboratory for the separation of a mixture that contains two immiscible solvents. It's made up of two phases;

- aqueous phase and

- organic phase.

The position of these phase depends on the selection of the solvent that makes it up. If the organic solvent is less dense than the aqueous solution, then the aqueous layer will be at the bottom layer in the separatory funnel.

d: the voltage of the secondary coil is less than that of the primary coil.

im not suree sorry if wrong

answer is: naturally occurring solid, inorganic compound or element is mineral.

minerals usually have crystalline form, that means than crystal constituents (atoms, molecules or ions) are arranged in a highly ordered microscopic structure, forming a crystal lattice that extends in all directions.

for example magnetite is a mineral of iron oxide (fe₂o₃).

calcite is a carbonate mineral and the most stable polymorph of calcium carbonate (caco₃).

dolomite is an   carbonate mineral composed of calcium magnesium carbonate (camg(co₃)₂).