The rate law, rate constant, and reactant concentrations for the reaction of nitrogen dioxide with oxygen are given. What is the rate of the reaction under these conditions? R = k[NO]2[O2], k = 7,000 M-2 • s-1

[NO] = 0.040 M, [O2] = 0.060 M

A. R = 7,000 M-2 • s-1

B. R = 16.8 s-1

C. R = 0.672 M • s-1

D. R = 0.040 M2 • s-1

Consider hydrogen in an excited state n = 5n=5 that emits photons to reach the ground state. there are various possible transitions other than straight to the ground state that can occur; for example, it can drop to the n = 3n=3 state followed by the n = 3n=3 to the ground state transition. which of the possible transitions will result in the emission of a photon in the visible region?

An uncovered pot of water lies out in the sun. which statements correctly describe what happens at the surface of the liquid water? 1. the vapor pressure remains constant regardless of the water temperature. 2. the vapor pressure is produced by water molecules that have evaporated. 3. the vapor pressure increases as the sun heats the water in the pot. 4. evaporation stops once the vapor pressure reaches a certain point. 5. evaporation and condensation both occur on the liquid’s surface.

Chemical bonds result from the interaction of the from two or more atoms. a. protons b. electrons c. neutrons d. nuclei