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The Keq of a biochemical reaction is 19.0. Calculate the standard free energy change associated with this reaction. (R=1.987, T=298, Lnx=2.303 log10X).
Is the reaction (i) exergonic or endergonic? (ii) spontaneous or nonspontaneous? Breifly explain
If the enthalpy change associated with the reaction is -1000 cals/mol calculate the entropy change.
a solution is 40 acetic acid by mass. the density of this solution is 1.049 gml. calculate the mass of pure acetic acid
If a compound is 13.6% C by mass and 86.4% F by mass, what is its empirical formula. if its molar mass is 176g/mol, what is its molecular formula
The standard cell potential (E°cell) for the reaction below is +0.63 V. The cell potential for this reaction is __________ V when [Zn2+] = 2.5 M and [Pb2+] = 1.5 × 10-4 M Pb2+ (aq) + Zn (s) ? Zn2+ (aq) + Pb (s)
Find the pH of a solution after 0.10 mol of HCl is added to 1.0 L of a buffer solution that contains 1.40 M NH3 and 0.90 M NH4+.
how does edta react with soap. i know it reacts with sodium by replacing some of the hydrogens of the hydroxyl groups
Two unknowns X and Y both having molecular formulas C4H8O, give the following results with four chemical tests. Propose structures for X and Y consistent with this infomation, Bromine Na Metal Chromic Acid Lucas Reagent
how much energy in joules does it take to raise 25.0g of liquid ethanol at 25.0degc to 78.0degc and then evaporate?
keisha wants to measure how the temperature of a gas affects its volume. explain which variable she should change which
A battery charger use to recharge NiMH batteries can deliever as much as 0.30 A of current to each battery.
HClO is a weak acid (Ka = 4.0 × 10-8) and so the salt NaClO acts as a weak base. What is the pH of a solution that is 0.077 M in NaClO?
Solid iron reacts with chlorine gas to produce iron(III) chloride. If 10.0 grams of iron reacts with excess chlorine gas and 18.5 grams of iron(III) chloride is produced, what is the percent yield of the iron(III) chloride
what is the mole fraction of each componet in solution? ethanol, methanol, water.
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