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Question: The activation energy of an uncatalyzed reaction is 95 kj/mol. The addition of a catalyst lowers the activation energy to 55 kj/mol. Assuming that the collision factor remains the same, by what factor will the catalyst increase the rate of the reaction at
(a) 25°C,
(b) 125°C?
Compare and contrast the following: size exclusion chromatography and ion exchange chromatography... points to include would be methods of action used in both, examples of use for both, advantages and disadvantages and levels of sensitivity or det..
Use the Nernst equation to calculate the expected potential in the battery in parts 2(d) and 2(e) when the following concentrations are present: [Cr2O72?] = 3.7 x 10?3 M ; [Cr3+] = 0.0112 M
Explain why the first ionization energy trend tends to increase as one proceeds left to right across a period. Why is the first ionization of aluminum lower than that of magnesium and the first ionization of sulfer lower than that of phosphorus
Complete and balance the following half-reactions. In each case indicate whether the half-reaction is an oxidation or reduction. Use the lowest possible coefficients. Include states-of-matter under SATP conditions in your answer.
The half-life of mercury-197 is 64.1 hours. A. If a patient undergoing a kidney scan is given 5.0 ng of mercury-197, how much will remain after 7 days? B. After 33 days
What will the following peptides look like structurally at pH 1, pH 7, pH 12. (You will draw 3 structures for each.)
Ethanol has a molar mass of 46.08g/mol and a density of 0.789g/mL. It is a clear, colorless liquid that dissolves readily in water. How many milliliters of ethanol would be needed to make 1.20L of a 2.75M solution?
What volume of H2 gas (in L ), measured at 742 mmHg and 84C, is required to synthesize 25.8g of CH3OH?
A 10.0mL portion of this solution is then diluted to a final volume of 100.0mL. Find the molarity of the final aluminum acetate solution. Find the molarity of acetate anion in the final solution.
A gas mixture contains 4.8 g of N2, 7.4 g of H2, and 6.6 g of CH4. What is the mole fraction of H2 in the mixture
Explain what the final concentration of a NaOH solution is when 67mL of .75M NaPH is poured into a volumetric flask and diluted to 5.0L with water
Question- A student mixes 35.0 mL of 2.54 M Pb(NO3)2(aq) with 20.0 mL of 0.00171 M Na2SO4(aq). How many moles of PbSO4(s) precipitate from the resulting solution. Ksp[PbSO4(s)] = 2.5*10^-8
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