Gases
What do you use to measure the difference in pressure between atmospheric pressure and the gas in the vessel.
A Manometer
One type of sunburn occurs on exposure to UV light of wavelength in the vicinity of 325 nm. What is the energy of a photon of this wavelength? What is the frequency?
6.12 x 10^-19 J
9.23 x 10 ^-14 Hz
What is the trend for atomic radius and ionization energy?
Radius: increase to the left and down
Ionization: increase to the right and up
A fixed quantity of a gas is subjected to a decrease in pressure and a increase in temperature. The volume of the gas:
increases
A sample of gas had a pressure of 365 mm Hg. What is the pressure in atmospheres?
0.480 atm
In an atom, what is the maximum number of electrons that can have the quantum number n = 4 and ms = 1/2 ?
16
Why do elements within the same group have similar properties?
Due to having the same number of valence electrons
Which rule says that no two electrons can have the same set of four quantum numbers and that each orbital can only hold two electrons with opposite spins?
Pauli exclusion principle
A 0.50 mol sample of O2 is confined at 0 C and 1.0 atm in a cylinder with a piston. The piston compresses the gas so that the final volume is half the initial, and the final pressure is 2.2 atm. What is the final temperature of the gas in Celsius?
27 C
Write the allowed sets of orbital quantum numbers for n = 1 and n =2
n = 1
l = 0
ml = 0
n = 2
l = 0, 1
ml = -1, 0 , 1
Rank the following five atomic species in order of increasing atomic radius (smallest to largest): Si, Na, K, F, O
F, O, Si, Na, K
The amount of energy absorbed in the process in which an electron is added to a neutral gaseous atom is defined as _________
electron affinity
Calculate the average molar mass of dry air if it has a density of 1.17 g/L at 21 C and 740.0 torr.
29 g/mol
What is the electron configuration for Mercury?
1s2 2s2 2p6 3s2 3p6 4s2 3d10 4p6 5s2 4d10 5p6 6s2 4f14 5d10
Why does the electron affinity of nitrogen differ from that of carbon? Why doesn't it follow the normal trend?
The minimum energy required to remove the most loosely held electron is:
first ionization energy
If an air bag has a volume of 36 L and is to be filled with nitrogen gas at 1.15 atm and 26.0 C, how many grams of NaN3 must be decomposed?
2 NaN3 -> 2 Na + 3 N2
73.1 g
Write the electron configuration for Fe 3+
1s2 2s2 2p6 3s2 3p6 3d5
Ionization energy and electron affinity of nonmetals?
Nonmetals have high ionization and high electron affinity