Arsenic Acid (H3AsO4) is a triprotic acid with Ka1 = 5.5x10^-3 Ka2 = 1.7x10^-7 and Ka3 =5.1x10^-12. calculate [H+], [OH-], [H3AsO4], [H2AsO4^-], [HsO4^2-] and [AsO4^3-] in a .20M arsenic solution

Which of the following statements is not true about regions? a.) regions have fixed boundaries that are determined by the region's inhabitants.b.) a region can be defined by physical characteristics, such as climate, landform, and vegetation.c.) regions can change over time.d.) a region can be defined by human characteristics, such as language, government, and economic activity.e.) the same location can be considered part of multiple regions.

What was the main aim of the northwest ordinance of 1787

Can someone ! who is the intended audience for cortés—general description of tenochtitlán i need to fill out a hap-p chart pleaaasse