A substance has a freezing point of 24 °C. Which of the following is true for the substance? a. When the substance is heated, its temperature will start rising above 24 °C after 50% of the liquid has changed to vapors. b. When the substance is heated, its temperature will start rising above 24 °C after 100% of the solid has changed to liquid.
c. When the substance is cooled, its temperature will fall below 24 °C after 100% of the vapors have changed to liquid.
d. When the substance is cooled, its temperature will fall below 24 °C after 50% of the liquid has changed to solid.

Diamond, graphite, and fullerenes share what property? a. they are all made of carbon (c) bonded to a metal. b. their shape. c. they are all made of carbon (c). d. they are all good conductors.

What is the overall order of reaction for rate = k[no2]2 ? second order 3/2 order third order zero order none of the listed answers are correct

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?