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An electron in the n=4 energy level of a He+ atom could be in any number of degenerate energy states or orbitals. List all of the possible values of the 1 and m1 quantum numbers for n=4, identify the 1 values in terms of the usual letters (e.g. s, p,d, etc), and give the total number of degenerate energy states or orbitals for n=4.
Chlorine gas is known to have a density of 3.17 g/L at standard temperature and pressure. What would be the volume of a 4.6 gram sample of chlorine gas at standard temperature and pressure?
EDTA solution to reach the end point in a titration. What mass (in milligrams) of CaCO3 (FW = 100.09 g/mol) will react with 1.85 mL of the EDTA solution?
An oil bath maintained at 50.5 oC loses heat to its surroundings at the rate of 4.68 kJ/min. Its temperature is maintained by an electrically heated coil with a resistance of 60 operated from a 110 V line.
A gas-filled balloon having a volume of 6.00 L at 1.2 atm and 25°C is allowed to rise to the stratosphere (about 30 km above the surface of Earth), where the temperature and pressure are -23°C and 3.00 10-3 atm, respectively. Calculate the final v..
The rate law of a given reaction is rate=k[reactant]^2, with k=2.64 x 10^-4 M-1min-1. If the initial concentration is 0.0250 M, what is the initial rate?
That depicts that two hydrogen atoms bond with one oxygen atom to make the compound we call water. If water comprises most of our body mass explain simply why there is a greater amount of oxygen by mass in our bodies than hydrogen.
A 0.451 M solution of a weak acid, HA, has a pH of 4.01. Calculate Ka for the acid. Use E notation and 3 significant figures.
Suppose a vessel contains 6.4 g of NH3, how many grams of O2 are needed for a complete reaction?
at 1 atm, how much energy is required to heat 55.0 grams of water at -24.0 degrees Celsius to water at 157.0 degrees Celsius
A student adds 0.1 mol of oxalic acid (H2C2O4) and 0.1mol of sodium dihydrogen phosphate to enough water to make 1.0L of solution. The following equilibrium is established with Kc from this reaction greater than 1
We did TLC and column chromatography separating methylene blue and fluorescein. The solvent contained mostly ethanol but also had NaOH, and this NaOH formed SiO- with the silica (the stationary phase), which is in competition with the solvent for ..
The student then titrated 25.0 ml of the same buffer with 0.1115 M NaOH. The observed titration curve is shown below
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