2points
what is the frequency of an electromagnetic wave with energy of 5.0 x 10-20
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a. 7.55 x 1013 hz
b. 5.22 x 105 hz
c. 3.98 x 10-6 hz
d. 1.67 * 10-28 hz
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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?

When did stem cell research become known ? who discovered stem cell? what experiments or studies have been conducted so far?

The graph shows one consequence of urban sprawl. how did urban sprawl contribute to the change in biodiversity