Most street lights are made from one of two elements—mercury or sodium. explain why astronomers prefer that cities use sodium street lights instead of mercury street lights.

How many moles of gas are present if p=11 atm, v=12l, t=185k?

Which is an example of the practical pursuit of alchemy? a. forming perfect substances. b. transforming base metals. c. developing metalworking techniques. d. linking spiritual characteristics with material substances.

Some animals that try to adapt to climate changes eventually die due to starvation, as climate change alters the web.