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The isomerization of cyclopropane follows first order kinetics. The rate constant at 700 K is 6.20 × 10-4 min-1, and the half-life at 760 K is 29.0 min. Calculate the activation energy for thi
The decomposition of aqueous hydrogen peroxide to gaseous O2 and water is the first order reaction. If it takes 8.0 h for the concentration of H2O2 to decrease from 0.80 M to 0.40 M. How many hours
When 5.0g of an unknown substance is dissolved in 100.0g of water, the freezing point of the solution decreases by 1.5 degrees celsius. What is the molar mass of the unknown substance if the compoun
On analysis, an equilibrium mixture for the reaction 2H2S(g) 2H2(g) + S2(g) was found to contain 1.0 mol H2S, 4.0 mol H2, and 0.80 mol S2 in a 4.0 L vessel. Calculate the equilibrium constant, Kc, for
If a vessel initially contains a concentration of 9.31E-5 M of formyl radicals, what is the predicted concentration after 8 min have elapsed?
The isomerization of cyclopropane to form propene is a first-order reaction.
A slightly bruised apple will rot four times faster at 20 degrees Celsius than in a refrigerated at 0 degrees Celsius. Compute the activation energy for the rotting process, please show work.
What is the complete ionic equation for the reaction between HC2H3O2 and NH3? It says to use the Hydronium ion (H3O) instead of H+ ion
Calculate the partial pressures of the three gases remaining at the completion of the reaction if the total pressure due to the mixture is 5.00 atm.
Potassium nitrate has a lattice energy of -163.8 kcal/mol and a heat of hydration of -155.5 kcal/mol. How much potassium nitrate has to dissolve in water to absorb 103kJ of heat?
You need to make 1.00 kg of a 22.5% ammonium chloride solution. How many grams of ammonium chloride do you use? What volume of water will be used?
A weather report gives a current atmospheric pressure reading of 546.5 mm Hg. Express this reading in atmospheres.
A solution is prepared by adding 1.75 mg of an unknown protein to enough water to make a 13.5 mL solution. The osmotic pressure of the solution is measured to be 1.6E-3 bar at 25 C. What is the calc
Write a chemical equation for the titration with methyl orange the weak base used was sodium carbonate and the weak acid used was HCl
While performing the assays for the LDH kinetics experiment, you will pipet 10 ul of 250 ug/ml LDH into 990 ul of assay buffer (Tris, Lactate, and NAD). What is the final concentration of LDH in th
Which of the four main categories of biological compounds-carbohydrates, lipids, proteins, and nucleic acids-contains the highest concentration of calories?
If k = 2 x 10^-5 L/mol-sec at 25 degrees C and k = 2 x 10^-4 L/mol -sec at 100 degrees C, determine the activation energy Ea in Joules/mol.
What is the definition of the joule in terms of the basic SI units?
Describe the main components of the Liquid Chromatography-Mass Spec and how they are used in sample identification. (Imagine that you follow the sample through the LC-MS: describe what is happening
There are many types of covalent bonds with varying polarities, and there are also multiple covalent bonds (double, triple) Which ones are stronger than ionic bonds, and which ones are weaker?
A first-order reaction had a rate constant , k , of 0.0123 1/s. If the initial concentration of reactant is 1.25M , what will be the concentration of reactant after 10 minutes? show your work.
An aqueous dextrose solution having a density of 1.04 g/cm3 freezes at -1.15°C. Find the osmotic pressure of this solution at 25°C. Kf of water is 1.86 °C/m; molecular mass of dextrose =
What is the molar concentration of 20.0 mL of an aqueous solution of HCl that requires 32.0 mL of 0.0260 M solution of NaOH for complete neutralization?
Assess the value obtained, indicating why the result is only an estimate and whether the actual radius should be larger or smaller than the estimate.
A glycine buffer is prepared by mixing 100 mL of 1.0M glycine, pH 6.0, with 100 mL of 0.5M NaOH and 300 mL of water. The pKa values for glycine are 2.4 and 9.6. What is the concentration of the buff