If crystal growth does not start on its own after the solution in the flask returns to room temperature, identify the best ways to promote this process. a. Add ice cubes to the solution.
b. Scratch the bottom of the flask gently with a stirring rod.
c. Add a bit of solid as a seed crystal.
d. Place the flask on a hot plate to evaporate some solvent.

In 2002, the rare earth elements mine in mountain pass, california was closed because

Ascientist wants to know how individual lions within a pride interact with each other in their own environment. to do this, the scientist sedates and tags all of the lions within a pride. then, he places several remotely-controlled video cameras near the lions' den and performs an observational field study. he collects continuous video footage over the span of one year, analyzes the video, and then forms conclusions based on his observations.

The equation below shows the reaction of zinc with hydrochloric acid (hcl). zn (s) + 2 hcl (aq) —> zncl2 (aq) + h2 (g) what will happen if the concentration of hcl is decreased? a. more zncl2 will be produced. b. the reaction rate will slow down. c. the hydrochloric acid will become more acidic. d. the reaction will produce water instead of hydrogen gas.