A student ran the following reaction in the laboratory at 765 K: N2(g) + 3H2(g) 2NH3(g)

When she introduced 3.79×10-2 moles of N2(g) and 6.76×10-2 moles of H2(g) into a 1.00 liter container, she found the equilibrium concentration of NH3(g) to be 8.42×10-4 M.

Calculate the equilibrium constant, Kc, she obtained for this reaction.

Kc=

Maria wants to determine which type of disinfectant kills the most bacteria. which of the following is the best way for maria to determine this? a. ask ten different companies that make disinfectants which type is best. b. put the same amount and species of bacteria on ten identical plates, and add ten different kinds of disinfectant to each plate. c. interview ten different people to determine which type of disinfectant they prefer. d. put the same amount and species of bacteria on ten identical plates, and add a different disinfectant to each plate.

What must occur for air masses to form fronts

Which of the following has wavelength longer than the wavelength of viable light? a) x rays b) gamma rays c) radios waves d) ultraviolet waves