21 given the following acid dissociation constants, which acid has the strongest conjugate base? ch3cooh ka = 1.8 x 10-5 hcn ka = 6.2 x 10-10 hocl ka = 3.0 x 10-8 hio3 ka = 0.17 ch3cooh hocl hcn hio3

The characteristic of two different types of reactions are shown below. reaction a: electrons are gained by the atoms of an element. reaction b: protons are lost by the atom of and element. which statement is true about the atoms of the elements that participate in the two reactions? a: their identity changes in both reaction a and b. b: their identity changes in reaction a but not b. c: their identity changes in reaction b but not a. d: their identity remains the same.

An alloy contains 66 g of pure zinc. what is the percentage of zinc in the alloy? express your answer to two significant figures and include the appropriate units.

Light waves can move through , but they travel fastest when they move through a(n) .