Which of the following mean: do not have continuous flowing water year-round and are not “relatively permanent waters” (pick all that apply) a. complacent streams
b. ephemeral streams
c. intermittent streams
d. permanent streams

Answer:   [b]:   "cultural" .

So  if  the sum of the enthalpies of the reactants is greater than the products, the  reaction  will be  exothermic.  if  the products side has a larger enthalpy, the  reaction  is  endothermic. you may wonder why  endothermic reactions, which soak up energy or enthalpy from the environment, even happen

Your answer would be 625,000,000.