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A sealed container holds 1.00 mole of helium and 2.00 moles of nitrogen at 30.0°C. When the total pressure of the mixture is 666 mm Hg, what is the partial pressure of the nitrogen in mm Hg? Provide an answer correct to 2 significant figures. Do not use scientific notation. Do not include units in your answer. For example, if you calculate that the correct answer is 514 mm Hg, simply type "510" in the box without the quotation marks (") or units as part of your answer.
Depict the product of the reaction between 3-phenylpropyne and NaNH2 in NH3, then D3O+, followed by D2, Pd/C.
How many grams of dry NH4Cl need to be added to 2.50 L of a 0.800 M solution of ammonia, NH3, to prepare a buffer solution that has a pH of 8.74? Kb for ammonia is 1.8*10^-5.
Electrolytic cell in which Mn^2+ is reduced to Mn and Sn is oxidized to Sn^2+. (Assume standard conditions). Write an equation for the half-reaction occurring at each electrode.
A buffer is prepared by adding 0.30 mol CH3COONa to 2.0 L of a 0.10 M CH3COOH solution. Calculate the pH after 0.030 mol HCl are added to the buffer. (Ka for CH3COOH = 1.8 x 10-5)
lda is added to a solution containing ethyl butanoate. after thisreaction has gone to completion propanal is added.
Would your calculation of the atomic mass of the metal be too high or too low if your hot metal sample cooled off, unbeknownst to you, while being transferred to the calorimeter
Which condition characterizes the stoichiometric point of any acid/base titration? a) equivalent molar amounts of acid and base have reacted. b) The pH is exactly 7.0 c) The indicator changes from pink to colorless
A titration was set up with standard potassium permanganate solution(.020 M). A volume of 17 mL potassium permanganate was need to reach the endpoint.
Explain which of the subsequent will cause the volume of an ideal gas to triple in value. Increasing the temperature from 25°C to 75°C at constant pressure.
In a washing machine, water is extracted from clothes by a rapidly spinning drum (Fig. 3.25). Explain the physics behind this process.
A mixture consists of lithium carbonate (Li2CO3) and potassium carbonate (K2CO3). These react with hydrochloric acid as follows.
In the laboratory you dissolve 16.7 g of barium chloride in a volumetric flask and add water to a total volume of 125 mL. What is the molarity of the solution
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