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1.Suppose that you are going to collect H2 gas produced from the reaction of an acid with a metal such as zinc. This reaction gives off heat, so the tem perature of the solution will increase as the reaction proceeds. You need to know the partial pressure of the H2 you generate as precisely as possible What will you need to account for in your calculation? What things would you need to measure to make accurate calculations? What information would you need to look up?
2.Three acid samples are prepared for titration by 0.066040 M NaOH. Sample 1 is prepared by dissolving 0.015 mol of HCl in 50 mL of water. Sample 2 is prepared by dissolving 0.015 mol of HCl in 60 mL of water. Sample 3 is prepared by dissolving 0.015 mol of HCl in 40 mL of water. Rank the concentratio n of the three solutions, from highest to lowest. When the titration is performed, which sample, if any, will require the largest volume of 0.066040 M NaOH for the neutralization? Explain your answer.
3.What volume of 12.4 M HCl is needed to make 250 mL of 7.7040 M HCl
Any help on this problem would be appreciated! Not quite sure how to to use the solubility values in this problem. How can we determine the how many grams will crystallize
Poisons such as sodium azide and sodium cyanide inactivate hemoglobin by irreversibly binding to the heme group of the molecule. These poisons also inactivate the electron transport chain.
If someone puts .600 mL of a 3.00% hydrogen peroxide solution on a cut, how many moles of hydrogen peroxide are used. Assume the density of the solution is equal to the density of water.
In the expression for f which you obtain, use a power series expansion of the exponential function
A reaction has an equilibrium constant of 8.2 X 10^3 at 298 K. At 764 K , the equilibrium constant is 0.53. Find Delta H rxn for the reaction.
express the work of isothermal reversible expansion of a van der waals gas in reduced variables and find a definition of reduced work that makes the overall expression independent of the identity of the gas.
A key oxidative step(s) in the B-oxidation cycle of fatty acids includes: a. addition of water to a double bond b. generation of a double bond from two adjacent -CH2 carbons
Calculate total and individual w, q, ΔU, ΔH, and ΔS of an Otto engine operating on stoichiometric ethanol - oxygen gas mixture, with cylinder volume of 1 l and compression ratio of 18:1.
At 700 Kelvin the Kp=54 for H2 + I2 > 2HI and Kp=1.04E-4 for N2 + 3H2 > 2NH3. Determine the Kp for reaction 2NH3 + 3I2 > 6HI + N2 at 700 Kelvin.
Calculate mass of solid sodium benzoate (MW = 122.0 g/mole) required to mix with 100.0 mL of 1.0 M benzoic acid to prepare a pH 5 buffer. Ka of benzoic acid = 6.3E-5.
A stainless steel spoon weighs 25.2 g and is at a temperature of 18.5 oC. It is immersed in 81.7 mL of hot coffee (T = 84.0 oC) in a Thermos flask.
The temperature of a block of copper metal (molar mass 63.55 g mol-1) fell by 8.52 K when the copper block released 64.5 J of heat. What is the mass of the copper block?
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