A student is given a cube of metal that is known to have a mass of 125.0 grams. She measures the mass of the metal four different times with the following results: 125.1 g, 124.8 g, 125.3 g and 124.2. Calculate the percent error of the student.

What does earth’s rotation on its axis cause? the tides night and day passing of years phases of the moon

In the following redox reaction which is the oxidizing agent and which is the reducing agent? alcl3 + na nacl + al

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?