How many moles of oxygen must be placed
in a 3.00 l container to exert a pressure of 2.00 atm at 25.0°c?

i did (2.00)(3.00) divded by (0.0821) (298) and i'm still getting the answer as 27,700 or something like that. i know i did the equation right? but, i keep getting the wrong answer. .

Which of the dna typing techniques do you think you would choose if you had to analyze a dna sample? why?

Calculate the ratio of h+ ions to oh– ions at a ph = 7. find the concentration of h+ ions to oh– ions listed in table b of your student guide. then divide the h+ concentration by the oh– concentration. record this calculated ratio in table a of your student guide. compare your approximated and calculated ratios of h+ ions to oh– ions at a ph = 7. are they the same? why or why not? record your comparison in table a. what is the concentration of h+ ions at a ph = 7? mol/l what is the concentration of oh– ions at a ph = 7? mol/l what is the ratio of h+ ions to oh– ions at a ph = 7? : 1

Which of the following is not one of the steps in the scientific method a. hypothesize b. summarize c. analyze d. familiarize