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Question: A quantity of oxygen gas is contained in a vessel of volume V = 1m3 at a temperature of T = 300K and a pressure of P. The vessel is connected
to a mercury-filled tube as shown in Fig. Note that the upper end of the tube is open to the atmosphere.
a. Is P greater or lesser than 1 atm? Calculate P in units of Torr and also pascals.
b. If the temperature of the gas is doubled, keeping V constant, by what factor does each of the following change?
i. density (g/cm3)
ii. average kinetic energy of a molecule
iii. rate of molecular collision with the walls
iv. vrms v. mass of 1 mole of gas
c. By means of a small pump the gas pressure is reduced to 100 Torr, while the temperature and volume remain fixed at 300K and 1m3. What then is the average kinetic energy of 1 molecule of the gas? Express your final answer in eV.
hydrochloric acid for neutralization. A 12.0mL volume of a phosphoric acid solution requires 35.1mL of the sodium hydroxide solution for complete neutralization.
In the reaction below, 6.76 atm each of Cl2 and I2 were placed into a 1.00 L flask and allowed to react: Cl2(g) + I2(g) 2 ICl(g) Given that Kc = 45.9, calculate the equilibrium pressure of Cl2.
Balance the following oxidation-reduction (redox) reactions using the half reactions method.
How many mL of a 0.8 M NaOH(aq) solution are required to make 500 mL of a solution with pH=12.50?
Calculate the volume of a sample of carbon monoxide at -60.6°C and 801 torr if it occupies 29.4 L at 372 K and 189 torr.
Identify the group of elements that corresponds to each of the following generalized electron configurations and indicate the number of unpaired electrons for each:
If you dilute 25.0 mL of 1.50 M hydrochloric acid to 500 mL, what is the molar concentration of the dilute acid
Using the data on protonation of nucleotides and phosphoric acid species, explain why the double helix of DNA is disrupted when the pH of solution is lowered from 7.0 to 1.0.
A solution is prepared by disolving 0.60 g of nicotine (a nonelectrolyte) in water to make 12 ml of solution. The osmotic pressure of the solution is 7.55 atm at 25 celcius. The molecular weight of nicotine is HOW MANY g/mol
Calcein indicator is added to the solution. The sample then requires 10.00 mL of 0.0120 M EDTA for titration. Calculate for this sample (a) the molarity of the calcium present, (b), the molarity of the magnesium present, and (c) the total hardness..
A flow of 1.4 MGD is treated with sodium silicofluoride (Na2SiF6) to provide a fluorideion dose of 1.3 mg/L. what is the feed rate in pounds per day?
What is the effect on the calculated concentration of the standard solution if the trials of the pure KHP samples are consistently over-titrated to a deeper magenta color?
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