What is a solvent? Question 1 options:

A part of the chromatography apparatus.

The paper that is placed in the liquid.

A substance, usually liquid, that can dissolve other substance.

A substance that is dissolved.

Stoichiometry- i need with 14 and 15! an explanation would be appreciated!

A0.10 m aqueous solution of sodium sulfate is a better conductor of electricity than a 0.10 m aqueous solution of sodium chloride. which of the following best explains this observation? (a) sodium sulfate is more soluble in water than sodium chloride. (b) sodium sulfate has a higher molar mass than sodium chloride. (c) to prepare a given volume of 0.10 m solution, the mass of sodium sulfate needed is more than twice the mass of sodium chloride needed. (d) more moles of ions are present in a given volume of 0.10 m sodium sulfate than in the same volume of 0.10 m sodium chloride. (e) the degree of dissociation of sodium sulfate in solution is significantly greater than that of sodium chloride.

Is cutting your nails a physical or chemical change