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Three pure compounds are formed when 1.00-{\rm g} samples of element X combine with, respectively, 0.472 {\rm g}, 0.630 g, and 0.789 g of element {\rm Z}. The first compound has the formula {\rm{X}}_2 {\rm{Z}}_3.
At equilibrium, the concentration of the product methanol was found to be 0.060 M. The value of the equilibrium constant Kc for this reaction is
the mass of the flask is measured when the outside of the flask is wet. However in part B.3 the outside of the flask is dried before its mass is measured.
when steam condenses to h2olliquid water heat of 2.26kj is released per gram. the heat from 168 grams of steam is used
Carbon dioxide is dissolved in blood to form a mixture of carbonic acid and bicarbonate. Neglecting free CO2 what fraction will be present as carbonic acid?
Draw the structure of the peptide in its predominant ionic form at a)pH 2; and b) pH 8 and determine its net charge at the specified pH values c) draw a titration curve of PH with respect to a dual axis with the equivalents of HCl added and the ne..
(a) What is teh rate law for the reaction. what is the value of the rate constant
For the following battery: Cd(s) | CdCl2(aq) || Cl-(aq) | Cl2(l) | C(s) Write the reduction half-reaction occuring at the C(s) electrode. (Include physical states of reactants and products.) From which electrode will electrons flow from the batter..
Explain how you arrived at this conclusions. Write a balance chemical equation for the reaction that occurs when sodium cyanide dissolves in water.
calculate the total volume of hydrogen gas which would be collected at 760 mm Hg and 25 degrees celsius. Will a second gas be present in the sample collected by water displacement
What is the pH of a buffer prepared by adding 0.45 mol of the waek acid HA to 0.608 mol of NaA in 2.00 L of solution? The dissociation constant Ka of HA is 5.66e-7
For restriction digestion, how would you dilute the 10X buffer so that it was at the correct concentration (1X) in the reaction solution
Calculate the difference in energy between the second and first levels and between the fourth and third level (i.e. find Delta E = En Upper - En Lower for n upper=2, n lower =1 and for n upper = 4, n lower =3)
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