Why haloalkanes are insoluble in water?

If the atomic mass of an atom is 34 and the atom contains 13 protons, how many neutrons does the atom contain?

Which of the following is not true about the atomic model of substances?

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.