Which of the following changes has a decrease in entropy? a. n2o4 (g) yields 2no2 (g)
b. c2h5oh (l) + 3o2 (g) yields 2co2 (g) + 3h2o (g)
c. 3o2 (g) + 2kcl (s) yields 2kclo3 (s)
d. h2o (l) yields h2o (g)

i think the answer is terrae but not 100 percent sure. ▓▬▬ §

every chemical equation adheres to the law of conservation of mass, which states that matter cannot be created or destroyed. therefore, there must be the same number of atoms of each element on each side of a chemical equation.

atomic mass = 39

number of neutrons = 20

number of protons= 19

electronic configuration = 1s2 2s2 2p6 3s2 3p6 4s1

the number of electron in first shell = 2

number of electrons in n=3 shell = 8