Please Help! If you had 1000 carbon atoms and pulled out one atom what would it’s mass likely be? Also, for hydrogen, which isotope is closest to the mass recorded on the periodic table? Why do you think this is based on the data for hydrogen?

You mix the pks of succinic acid are 4.21 and 5.64. how many gramsa graduate student at sdsu wants to measure the activity of a particular enzyme at ph 4.0. to buffer her reaction, she will use a buffer system based on one of the acids listed below, which acid is most appropriate for the experiment? of monosodium succinate (fw = 140 g/mol) and disodium succinate (fw = 162 g/mol) must be added to 1 l of water to produce a solution with a ph 5.28 and a total solute concentration of 100 mm? (assume the total volume remains 1 liter, answer in grams monosodium succinate, grams disodium succinate, respectively.) volumes of 0.05 m nah2po4 and 0.05 m na2hpo4 (pk's for phosphoric acid are 2.15, 6.82 and 12.38). which of the following best describes the resulting solution?

How would the number of moles (n) of o2 change if the atmospheric pressure doubled but all other variables stayed the same

Ineed this asap part i: scientific method what is the difference between science and pseudoscience? what is the scientific method?