Are crystalline rocks and crystalline evaporite rocks the same? PLEASE HELP

How many atoms are there in 5.70 mol of mg

What is the empirical formula of c6h18o3? ch3o c2h5o c2h6o c2h5o5

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.