CHEM 1320 Lecture Notes - Lecture 25: Energy Star, Azimuthal Quantum Number, Wave Equation

C---An important step in the synthesis of nitric acid is the reaction of ammonia (NH3) and molecular oxygen to form nitrogen monoxide gas and water vapor.

--Write a balanced equation for this reaction. (2 points)

--Calculate DHo for this reaction, using standard heat of formation values from Appendix G in the Open Stax Chemistry text. (3 points)

D----When an electron in a 2p orbital of a particular atom makes a transition to the 2s orbital, a photon of approximate wavelength 629.1 nm is emitted. What is the energy difference between these 2p and 2s orbitals?

E---Provide a numerical value (whole number) for each of the following questions. Briefly explain your reasoning (1 point each).

How many electrons can be contained in all of the orbitals withn = 4?

Among the orbitals with n = 4 (see part a), which one has the highest energy and how do you know this?

What is the l quantum number for a 4s orbital?

How many electrons can be described by the quantum numbersn = 3, l = 3, ml = 1?

l = 3, how many electrons can be contained in all the possible orbitals of a given principal quantum number?

1.Which of the following is not a valid set of quantum numbers?

2. Type the chemical symbol for the ION with a +2 charge whose ground state electron configuration has eight electrons in the 3d orbital.

3.All of the orbitals in a given subshell have the same value of the __________ quantum number.

4. Calculate the frequency of light, in Hz, that has a wavelength of (1.93x10^3) cm.

5. What is the maximum number of electrons that can occupy the orbitals represented by n = 5, l = 1?