You put to chemicals in a bottle and screw on the lid. when you shake in the bottle starts to warm up what kind of reaction is this?

The first element on the periodic table of elements is carbon. a. true b. false

Determine the empirical formula for succinic acid that is composed of 40.60% carbon, 5.18% hydrogen, and 54.22% oxygen.

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.