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A gas mixture contains H2 at 2/3 bar and O2 at 1/b bar at 298 K. The diameters of H2 is 0.272 nm and O2 is 0.360 nm. What is the collision frequency \(Z_{12}\) of a hydrogen molecule colliding with oxygen molecule
if 0.150 moles of salicylic and excess acetic anhydride are used during a synthesis of aspirin, how many grams of aspirin will be obtained if the reaction gives a 38% yield.
The osmotic pressure of a aqueous solution of a given polymer with mass concentration 0.300 g/mL is 10.0 torr at 298 K. Estimate the molar mass of the polymer.
Given a pure preparation of these algae, and the required supplies and equipment, devise and outline an empirical procedure for purifying Enzyme X.
How much heat does your body lose when 3.35g of sweat evaporates from your skin at 25 degrees celsius? (Assume that the sweat is only water.) The heat of vaporization of water at 25 degrees celsius is 44.0 kJ/mol.
Hydrogen is produced when methane(CH4) reacts with water. The other product is CO2. Using 80.0g of methane and 16.3g of water, how many liters of H2 can be produced at STP? what is the limiting reactant?
An 8mL sample of an unknown concentration of NH3 is titrated with HCl. It is found that 12mL of 0.10M HCl is required to reach the equivalence point. What was the concentration of the NH3 in the initial 8mL sample?
what elutes from the column when etc. Why do you think you use extraction techniques instead of chromatography?
The half-life for a first order reaction at 550 oC is 85 sec. How long it would take for 23% of the reactant to decompose?
A solution is prepared by adding 20.0 mL of 0.100 M KI to 20.0 mL of 0.100 M AgNO3. The potential of the solution is measured with a silver indicator electrode with respect to the saturated calomel electrode. Use activities in this problem.
At what point will the standard solution begin to deteriote after all the chemicals have been mixed? the answer should be in minutes
Find the mass of AlCl3 that is produced when 25.Og of Al2O3 react with HCl according to following equation Al2O3+6HCl-
Q 3: The salt NaBrO(3) oxides Sn^2+ to SnCl(6)^2- in the presence of hydrochloric acid according to the equation
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