Number of molecules in 5.0 x 10-6 mol CH3CH2OH Express your answer in molecules to two significant figures.

Which part of earth’s surface receives the most direct rays from the sun? a) equator b) ocean c) poles d) mountains

Under normal conditions, describe how increasing the temperatures effects the solubility of a typical salt

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.