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)

0.88 moles of n2o5 (g) was placed in a sealed 1.00 l vessel. calculate the equilibrium concentration of n2o5. no2, and o2 and the equilibrium constant after equilibrium has been reached by 65.0% of the n2o5 decomposing.

What is the reduction potential of a hydrogen electrode that is still at standard pressure, but has ph = 5.65 , relative to the she?

Using the periodic table, complete the following. element: hydrogen symbol: h₂ molecular weight: g mass of one mole: g/mol