1- A high altitude balloon is filled with 1,410 L of hydrogen at a temperature of
21°C and a pressure of 745 torr. What is the volume of the balloon at a height of 20 km, where the temperature is -48°C and the pressure is 63.1 torr?
2- What is the root mean square speed of a F2 molecule at 50°C?
3- Given the following gas molecules at 30°C, which would be expected to have the slowest average speed?
H2O SF4 H2 N2O
4- The Rydberg formula can also be written as:
Δ E = k ( 1/ n^1/2 − 1/ n^2/2 )
where the constant k = 2.178 × 10^ − 18 J
Solve when a single hydrogen atom absorbs 2.09 x 10^-18 J with its electron starting at the first energy level, at what energy level does the electron end? Remember n = whole intergers
5- Green light has a wavelength of 499 nm. What is the frequency?
6- What is the maximum number of orbitals which have quantum numbers: n = 4 and l = 1
7- Which of the following sets of quantum numbers are not allowed for an electron in an atom?
Choice n l ml ms
A 2 1 0 +1/2
B 2 3 +1 -1/2
C 3 2 -2 -1/2
D 2 2 0 +1/2
E 2 1 0 +1/2
8- List the following ions in order of increasing radius:
Br-, Li+, Te2-, Mg2+