Which of the following is an example of combustion? A. sodium cyanide + hydrochloric acid -> sodium sulfate + hydrogen eyanide
B. potassium chlorate -> potassium chloride oxygen
C. hexane + oxygen -> carbon dioxide + water
D. aluminum + cobalt chloride -> aluminum chloride + cobalt

According to the tide table below what time of day will the highest tide occur?

What metric units would you use to measure the thickness of a key

What effect would average population growth have on land usage? a. urban use of land would rise to more than 30 percent of available land. b. industrial use of land would rise to more than 30 percent of available land. c. the percentage of available land used as cropland would stay the same. d. cropland would fall to about 10 percent of available land.