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Compute the theoretical yield for the bromination of both stilbenes as well as cinnamic acid, presuming the presence of excess pyridinium tribromide.
The energy of activation for a certain reaction is measured to be 90.0kj/mol. The rate comstant of this reaction is 302.6 s^-1 at 300k. Suppose the reaction is heated to 316.0K. What will be the value of the rate constant at the higher temperature
Using the dumas method, you find that a sample weighing 71.6mg gives 3.84mL of nitrogen gas at 23 deg.celcius and 785 mmHg. What is the volume of nitrogen at STP?
Allocate each element an oxidation number. Find out which reactant is being oxidized and which is being reduced
Nitrogen gas reacts with oxygen gas to produce nitrogen monoxide in an endothermic reaction. When the temperature of the reaction at equilibrium is raised, the equilibrium will shift
What mass of magnesium chloride is needed to react with 145 g of silber nitrate accourding to the following reaction: MgCl2(aq)+2AgNO3(aq) -> Mg(NO3)2(aq) + 2AgCl
If the concentration of an acid in solution is 2.2 times larger than the concentration of its conjugate base, and the pH of the solution is 3.5, what is the pKa of the acid?
explain the probable effect of this procedural change on the experimental results?
A 250.0-L cylinder contains 65.0% He(g) and 35.0% Kr(g) by mass at 25.0° C and 1.35 atm total pressure. What is the partial pressure of He in this container?
Population ratio between two energy levels is 0.98. The space between the energy level is 0.625 meV. What is the system's temperature?
A gas sample containing 1.35 mol at 25°C exerts a pressure of 405 torr. Some gas is added to the same container, and the temperature is increased to 50.°C. If the pressure increases to 800. torr, how many moles of gas were added to the container?
What was the decay rate (in Bq) of this 226Ra sample at the time is was isolated. Assuming this sample was not diluted of otherwise separated or altered,
Which one of the following molecules has a zero dipole moment? A. CO B. CH2Cl2 D. SO2 C. SO3 E. NH3 67. Indicate the type of hybrid orbitals used by the central atom in CCl4. A. sp B. sp2 C. sp3 D. sp3d E. sp3d2 68. What is the hybridization of th..
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