Hi, if anyone could answer these for me, it would really help alot. This is science but Chemistry is the closest to that.​

Amass of 100.0 g of solute is dissolved in water so that 850. ml of a 0.7500 m solution has been prepared. what is the molar mass of the solute?

This image is an example of a(n) a) atom. b) compound. c) mixture. d) molecule.

This classification of drug typically changes the brain's chemistry and reduces its ability to create its own endorphins.