Calculate the biological standard potential of the NAD/NADH couple at 25°C from its thermodynamic value. The reduction half-reaction is
NAD+ (aq) + H+ (aq) + 2 e− → NADH(aq) E∅= −0.32 V

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?

Compare the equilibrium constants for the systems shown in the table. which favors products the most? which favors products the least? rank these systems in order from most to least in terms of favoring products rather than reactants. d > b > a > c c > a > b > d b > c > d > a a > d > c > b

Which other elements contain the same number of outer electrons as sodium