Chemistry 1210 EXAM#3
Terms in this set (15)
The goose has a mass of 17.3 lb (pounds) and is flying at 9.70 miles/h (miles per hour). What is the kinetic energy of the goose in joules?
INFO:A goose is flying south for the winter at a constant speed. Keep in mind that one mile is 1.61 km , and one pound is 454 g
A volume of 115 mL of H2O is initially at room temperature (22.00 ∘C). A chilled steel rod at 2.00 ∘C is placed in the water. If the final temperature of the system is 21.00 ∘C , what is the mass of the steel bar?
Use the following values:
specific heat of water = 4.18 J/(g⋅∘C)
specific heat of steel = 0.452 J/(g⋅∘C)
A piston has an external pressure of 8.00 atm. How much work has been done in joules if the cylinder goes from a volume of 0.180 liters to 0.620 liters?
How much boiling water would you need to raise the bath to body temperature (about 37 ∘C)? Assume that no heat is transferred to the surrounding environment.
INFO: Imagine that your water heater has broken, but you want to take a bath. You fill your bathtub with 25 kg of room-temperature water (about 25 ∘C). You figure that you can boil water on the stove and pour it into the bath to raise the temperature.
The amount of boiling water required to raise the temperature of 25.0 kg of water in the bath to body temperature is 4.80 kg.
In this process, the heat lost by the boiling water is equal to the heat gained by the room-temperature water. How much heat was transferred in this process
INFO:Imagine that your water heater has broken, but you want to take a bath. You fill your bathtub with 25 kg of room-temperature water (about 25 ∘C). You figure that you can boil water on the stove and pour it into the bath to raise the temperature.
A microwave oven operates at 2.20 GHz . What is the wavelength of the radiation produced by this appliance?
What wavelength λ should the astrophysicist look for to detect a transition of an electron from the n=6 to the n=3 level?
How much energy is required to ionize a hydrogen atom in its ground (or lowest energy) state?
What wavelength of light contains enough energy in a single photon to ionize a hydrogen atom?
Suppose that the microwave radiation has a wavelength of 12.4 cm . How many photons are required to heat 305 mL of coffee from 25.0 ∘C to 62.0 ∘C? Assume that the coffee has the same density, 0.997 g/mL , and specific heat capacity, 4.184 J/(g⋅K) , as water over this temperature range.
The emission line used for zinc determinations in atomic emission spectroscopy is 214 nm. If there are 6.00×1010 atoms of zinc emitting light in the instrument flame at any given instant, what energy (in joules) must the flame continuously supply to achieve this level of emission?
List a possible set of four quantum numbers (n, ℓ, mℓ, ms) in order, for the highest energy electron in gallium, Ga. Refer to the periodic table as necessary.
How many orbitals are there in the third shell (n=3)?
Give the complete ground-state electron configuration for silicon (Si).
Express the complete electron configuration using superscripts where appropriate. For example, the configuration for Li would be entered as 1s^22s^1.
Give the ground-state electron configuration for silicon (Si) using noble-gas shorthand.
Express your answer in condensed form as a series of orbitals. For example, [Ar]4s23d8 would be entered as [Ar]4s^23d^8.