Calculate the energy change associated with the transition from n=4 to n=1 in the hydrogen atom.
A) + 3.55 10-18 J Absorption
B) +2.04 x 10-18) Emmision
C)-3.55 x 10-18) Absorption
D) -2.04 x 10-18] Emmision

What is the mass defect of a mole of nuclei with 1.8 x 10^15 j/mol binding energy?

True or false exosphere is the least dense

The equilibrium constant kc for the reaction 2 nocl(g) → 2 no(g) + cl2(g) is 0.453 at a certain temperature. a mixture of nocl, no, and cl2 with concentrations 1.30, 1.20, and 0.600 m, respectively, was introduced into a container at this temperature. which of the following is true? 1. no apparent reaction takes place. 2. [cl2] = 0.30 m at equilibrium. 3. nocl(g) is produced until equilibrium is reached. 4. [nocl] = [no] = [cl2] at equilibrium. 5. cl2(g) is produced until equilibrium is