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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?

Draw the lewis dot structure for each of the following polyatomic ions

Δu of , in kj/kg, as it isto k, (a)as a of , (b) at , (c) at .