What factors generally determine whether a reaction happens or not? A. Reaction rate and color
B. Presence of water and salt
C. Enthalpy and entropy
D. Keg and Ka​

The yearly amounts of carbon emissions from cars in belgium are normally distributed with a mean of 13.9 gigagrams per year and a standard deviation of 5.8 gigagrams per year. find the probability that the amount of carbon emissions from cars in belgium for a randomly selected year are between 11.5 gigagrams and 14.0 gigagrams per year. a. 0.340 b. 0.660 c. 0.167 d. 0.397

Ajet plane is speeding down the runway during takeoff. air resistance is not negligible. identify the forces on the jet.

Aseismic wave is energy released as the result of rock movement along a fault. t or f ?