When counting the electron groups around the central atom to determine its shape, select the 4 ways that electron groups would be counted: Group of answer choices a triple bond would be counted as one electron group a lone pair on a terminal/peripheral atom would be counted as one electron group a lone pair on the central atom would be counted as one electron group a double bond would be counted as one electron group a double bond would be counted as two electron groups a triple bond would be counted as three electron groups a single bond would be counted as one electron group

Agas diffuses 1/7 times faster than hydrogen gas (h2). what is the molar mass of the gas? 100.10 g/mol 98.78 g/mol 86.68 g/mol 79.98 g/mol

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?

Stage in which a star’s outer layers have started to cool and grow outward?