3) Which solution has the highest boiling point at standard pressure?
(A) 0.10 M KNO3(aq)
(B) 0.10 M KCl(aq)
(C) 0.10 M K2SO4(aq)
(D) 0.10 M K3PO4(aq)

Asingle atom of an element has 21 neutrons, 20 electrons, and 20 protons. which element is it? ok o z

Asample of the male sex hormone testosterone, c19h28o2, contains 3.88×10^21 atoms of hydrogen.(a) how many atoms of carbon does it contain? (b) how many molecules of testosterone does it contain? (c) how many moles of testosterone does it contain? (d) what is the mass of this sample in grams?

Phosphorous acid, h3po3(aq) , is a diprotic oxyacid that is an important compound in industry and agriculture. the values of phosphorous acid are 1.30 6.70 calculate the ph for each of the given points in the titration of 50.0 ml of 1.5 m h3po3(aq) with 1.5 m koh(aq) .