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What molar ratio of sodium acetate to acetic acid (NaAc/HAc) should be used in preparing a buffer having a pH of 4.35? (Ka = 1.8×10-5 for acetic acid.)
Why should we study religions? What are some of the methods used to study religions? What are some of the problems and questions sometimes associated with them?
Draw an antiparallel beta sheet composed of two strands of polyalanine (each strand 3 residues in lenght). Show all hydrogen bonds.
Which of the following statements is true regarding the sale of a partnership interest?
Rank the primers in the order they were produced. If two primers were produced at the same time, overlap them.
The FDA claims that the mean nicotine content exceeds 30.2 milligrams for this brand of cigarette and their stated reliability is 99%. Do you agree?
A phosphorous acid buffer needs to be prepared to a pH of 5.92; given a 120mL solution of 25mM phosphorous acid, how many milliliters of either 0.5M KOH or 0.4M HCl will need to be added
Moon changed the classification of these shares to trading securities in June of 2011 when the market value of this investment in McMahon's stock had risen to $345,000. How much should Moon include as a loss on transfer of securities in its determ..
10 independent measurements were made of the pH level for both solutions, with the following data testing. Do the data disprove the scientist's claim? Use the 5% level of significance. What is the p-value?
Determine the pH and the percentage of fully protonated weak acid/base for each of the solutions listed below:
In addition, on December 20, 2011, subscriptions for 2,000 shares of preferred stock were taken at a purchase price of $17. These subscribed shares were paid for on January 2, 2012. What should Amelia report as total contributed capital on its Dec..
A litre of solution containing 0.1 M of CH3COOH and 0.1 M of CH3COONa provides a buffer of pH 4.74 . calculate the pH of a solution after the addition of 0.02 M of NaOH .
Determine the molecular weight of a compound given the gas phase data: mass of 11.8 g, temperature of 39.1 C, pressure of 630 torr, volume of 1.31 L.
Consider the molecule cyclohexane, which contains only hydrogen and carbon atoms. When a sample is burned in oxygen, 4.822 g of CO(2) and 1.650g of H(2)O are obtained. What is its simplest formula?
A certain second-order reaction has a rate constant of 1.10×10-3 at 27 C and an initial half-life of 226 . What is the concentration of the reactant after one half-life?
a gas cylinder witha volume of 3.00 dm^3 contains 8.00 moles of oxygen gas at a temperature of 50.0k. what is the pressure inside the cylinder.
What is the molecular formula of a compound with the empirical formula NO¿ and a molar mass of 138.02 grams per mole?
Find out the required pressure to compress 180 liters of N at 1.0 atm into a tank whose volume is 34 liters.
Consider the following reaction: CO + 2H2= CH3OH, kp= 2.26 x 10^2 at 25C . Calculate delta G for the reaction at 25C under each of the following conditions.
Compute the mass of Au(gold) that occupies 5.0 X 10^-3 cm^3. If the density of gold (Au) is given=19.3 g/cm^3.
Find the Density of a substance with a mass of 51.2g and a volume of 150mL
An aqueous solution of ethanol, C2H5OH, is 19.00% ethanol by mass and has a density of 0.9700 g mL-1. Calculate the molarity of the ethanol solution.
Gas stoichiometry and Percentage of calcium carbonate in the sample
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