Which of the reactions below are spontaneous?(Select ALL that are correct) a. Succinate + FAD --> Fumarate + FADH2 ∆G = 0 kJ/mol
b. 3-phosphoglycerate --> 2-phosphoglycerate ∆G = 0.8 kJ/mol
c. DHAP --> glyceraldehyde-3-phosphate ∆G = 2.5 kJ/mol
d. Phosphoenolpyruvate + ADP + H+ --> pyruvate + ATP ∆G = -16.7 kJ/mol

Modern pennies are composed of zinc coated with copper. a student determines the mass of a penny to be 2.482 g and then makes several scratches in the copper coaling (to expose the underlying zinc). the student puts the scratched penny in hydrochloric acid, where the following reaction occurs between the zinc and the hcl (the copper remains undissolved): zn(s) + 2 hcl(aq) → h2(g) + zncl(aq)the student collects the hydrogen produced over water at 25 °c. the collected gas occupies a volume of 0.899 l at a total pressure of 79 j mmhg. calculate the percent zinc (by mass) in the penny. (assume that all the zn in the penny dissolves.)

What causes most sediment to wash or fall into a river

Was there supercooling? would you expect the water or the sugar solution to have the most supercooling? why?