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1) 1) Calculate the total pressure (in atm) of a mixture of 0.0270 mol of helium, He, and 0.0200 mol of oxygen, O2, in a 4-L flask at 20°C. Assume ideal gas behavior.
2) 2) At what temperature does the rms speed of O2 molecules equal 601 m/s?
3)3) Pyruvic acid, HC3H3O3, is involved in cell metabolism. It can be assayed for (that is, the amount of it determined) by using a yeast enzyme. The enzyme makes the following reaction go to completion.
HC3H3O3(aq) → C2H4O(aq) + CO2(g)
If a sample containing pyruvic acid gives 22.4 mL of carbon dioxide gas, CO2, at 349 mmHg and 30°C, how many grams of pyruvic acid are there in the sample?
It is possible to determine the ionization energy for hydrogen using the Bohr equation. Calculate the ionization energy for an atom of hydrogen, making the assumption that ionization is the transition from n=1 to n=∞.
What is the pressure in a 10.0 L cylinder filled with 0.470 mol of nitrogen gas at a temperature of 329 K ?
What is the wavelength (in meters) of a proton (mass = 1.673*10^-24 g) that has been accelerated to 30% of the speed of light.
Calculate the pH of a solution resulting from mixing together the following: a) 37ml of HCL 0.1M+33ml of NaOH 0.03M b) 55ml of HNO3 0,7M+88ml of KOH 0.8M c) 170 ml of H2SO4 0,44M_29ml of NaOH 1.2M d)76 liters of HBr 0.01M+2 liters of Mg(OH)2 2.1M.
Standard Temperature and Pressure of Chlorine, Chlorine is widely used to purify municipal water supplies and to treat swimming pool waters. Suppose that the volume of a particular sample of Cl2 gas is 8.70 L at 895 torr and 240C.
A voltaic cell consists of an Au/Au3+ electrode (E° = 1.50 V) and a Cu/Cu2+ electrode (E° = 0.34 V). Calculate [Au3+] if [Cu2+] = 1.20 M and Ecell = 1.13 V at 25°C.
What is the volume of a gas at T=35.0C and P=675 torr if the same sample occupied 42.6L at T=-27.3C and P=1.000 atm.
Solid silver nitrate is added to a solution that is 0.0010 M each in NaCl, NaBr, and NaI. For AgI, ksp= 1.5x10^-16, for AgBr, ksp= 3.3x10^-13, and for AgCl, ksp= 1.8x10^-10
Calculate the values of E for the cell when the following volumes of the Ce^4+ titrant have been added. (Activity coefficients may be ignored as they tend to cancel when calculating concentrations of ratios.
A reaction of one liter of chlorine gas with 3 liters of fluorine gas yields 2 liters of a gaseous product. All gas volumes are at the same temperature and pressure. What is the formula of the gaseous product?
An aqueous solution contains 12.7% NaCl by mass. What mass of water (in grams)is contained in 2.5L of the vapor above this solution at 55 celcius? the vaor pressure of pure water at 55 celcius is 118 torr.
How much heat (in kJ) is evolved in converting 1.00 mol of steam at 160.0 degrees Celcius to ice at -45.0 C? The heat capacity of steam is 2.01 J/g and of ice is 2.09 J/g.
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