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Based on their activation energies and energy changes and assuming that all collision factors are the same, which of the following reactions would be fastest in the reverse direction?
(a) Ea = 45 kJ/mol; ΔE = -25 kJ/mol
(b) Ea = 35 kJ/mol; ΔE = -10 kJ/mol
(c) Ea = 55 kJ/mol; ΔE = 10 kJ/mol ;
At 40oC, Kc=0.0303 for the reaction below. H2 + Cl2 --> 2 HCl In an experiment carried out at 40oC, the initial concentrations were [H2]=[Cl2]=[HCl]=2.25 mol/L. What is the equilibrium concentration of HCl
A gas bottle contains 0.650 mol of gas at 730 mm Hg pressure. If the final pressure is 1.15 atm, how many moles of gas were added to the bottle.
A 7.50g sample of potassium nitrate (Mm=101) is dissolved in enough water to make 150. mL of solution. The density of the resulting solution is 1.03g/mL. a) Determine the molarity of this solution
evaporate more quickly: 55 mL of water in a beaker or 55 mLmof acetone in an identical beaker under identical conditions?
Water gas, a mixture of carbon monoxide and hydrogen, is produced by treating carbon (in the form of coke or coal) with steam at high temperatures.
Some plants require acidic soils for healthy growth. Which would be more productive to add to the soil in order to make it more acidic, Fe2(SO4)3 or Na2SO4, and why
Provide the name and structure of an herbicide not structurally related to those in this experiment, and indicate how the herbicide works
Calculate the energy for the transition of an electron from the n=8 level to the n=2 level of a hydrogen atom.
Calculate Ka for the unknown weak acid.
A graduated cylinder contains 129 mL of water. A 17.0 g piece of iron (density = 7.86 rm{g/cm^3}) and a 17.0 g piece of lead are added. What is the new water level in the cylinder?
The thermite reaction has been used to weld railroad rails, make bombs, and ignite solid rocket fuel. The equation of the reaction is:
Mg + 2HCl --> MgCl2 + H2 For a mass of 0.013 g Mg and 5.0 mL of 1.00 M HCl, in a flask with V = 140.612 mL at 23.5?C. Calculate the initial and final pressure (atm).
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