The temperature at which the forces holding a crystal lattice together are broken is

12. calculate the hydroxide ion concentration of a solution with ph = 3.25. show all calculations leading to an answer

Answer asap : ( a. how does mucus prevent the entry of pathogens? b. describe two ways white blood cells protect us from pathogens.

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.