Where does most manmade Nitrous Oxide come from?

Consider the equation s + o2 ? so2. what is the product? question 3 options: s so 2 s + so 2 o 2

The many stone tools, fragmentary animal bones, and teeth found at gran dolina, spain, indicate that hominids there? a. processed and consumed animals and other hominids. b. did not differ appreciably from earlier asian homo erectus. c. were similar to later homo sapiens. d. none of the above

Substances that can pass through cell membranes by diffusion include a. na ions. b. proteins c. glucose. d. oxygen.