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Explain the rate constant of a first-order reaction is 66s -1. Explain what is the rate constant in units of minutes?
A vessel of volume 22.4 L contains 2.0 mol H2 and 1.0 mol N2 at 273.15K. calculate (a) the mole fractions of each component, (b) their partial pressures, (c) their total pressure , (d) the density of the mixtures.
In proteins, the amino acid histidine (His) plays an important role in many biological reactions. The pKa for the protonation of His to form HisH
Joseph Priestley prepared oxygen by heating mercury(II) oxide. The compound HgO is stable at room temperature but decomposes into its elements (Hg and O2) at high temperatures. What conclusions can be drawn concerning DH and DS for this decomposit..
Calculate the pH after 15.0 mL of 0.40M HCL is added to 20.0 mL of 0.50 M NH3 (Kb NH3= 1.8 x 10^-5)
Which of the following reactions is (are) oxidation-reduction reactions? Explain your answer briefly.
Calculate the reaction Zn(s) + 2HCl(aq) ! ZnCl2(aq) + H2(g) What mass of ZnCl2 (MW = 136.3 g/mol) can be prepared from the reaction of 3.27 grams of zinc (MW = 65.38 g/mol) with 3.00 grams HCl (MW = 36.46)?
Based on the chemistry of an ion-exchange chromotography describe how you will calculate Mpc for your water samples.
Assuming the density of the solution is 1.00 grams/mL, what is the molar mass of the enzyme?
how much heat is required to raise the temperature of 50.0 grams of water from 55 degrees celcius? be sure to include
A beam of electrons is incident on a gas of hydrogen. What minimum speed must the electrons have to cause the emission of 656 nm light from the 3 to 2 transition of hydrogen? Through what pontetial difference must the electrons be accelerated to h..
What is the role of sodium sulfite in the experimental procedure of the creation of Benzoic acid. -I know that it breaks down any remaining bleach that did not react, but can someone please explain how it works
You wish to prepare 0.13 M HNO3 from a stock solution of nitric acid that is 13.1 M. How many milliliters of the stock solution do you require to make up 1.00 L of 0.13 M HNO3?
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