Please help I need this done

What stress will shift the following equilibrium system to the left? n2(g) + 3h2(g) ⇌ 2nh3(g) adding more n2(g) adding more nh3(g) increasing the pressure of the system reducing the volume of the container

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.