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Consider the reaction: 2B → C + 3D. In one experiment it was found that at 300 K the rate constant is 0.134L/(mol.s). A second experiment showed that at 450 K, the rate constant was 0.569 L/(mol.s). Determine the activation energy for the reaction.
How many methylene cyclopropene derivatives with molecular formula C4H2Cl2 are possible. Show them.
How would you prepare 500.0 mL of a 0.750 M solution using Sulfuric acide from 18.0 M concentrated liquid. B) Sodium carbonate powder
When 9.64x10-4 moles of this complex is dissolved into 425.0 mL of the water, you find that 19.22 mL of 0.1000 M HCl is needed to reach a titration endpoint. What is the final formula
A piece of metal of mass 18 g at 117?C is placed in a calorimeter containing 48.2 g of water at 21?C. The final temperature of the mixture is 85.4?C. What is the specific heat capacity of the metal? Assume that there is no energy lost to the surro..
A 50.0 mg sample of an unknown radioactive substance was placed in storage as well as its mass measured periodically. After 51.9 days, the amount of radioactive substance had decreased to 3.13mg. Explain what is the half life of the unknown radioa..
Problem- A 1.00 sample of solid magnesium was burned in oxygen to give a 1.658 g sample of pure MgO. The heat given off in this reaction was 24.76 kJ. Given this information, calculate the enthalpy of formation of 1 mol of MgO.
Order the following elements according to decreasing electronegativity: C, Ca, Cs, Cl, Cu.
Write the correct equation accounting for the ready formation of metallic deposit on placing a magnesium strip into 0.1 M iron nitrate
Calculate the mass fractions of the components in the mixture and the average molecular weight of the gas mix. b)The gases are mixed with 20% excess air and completely combusted with 100% conversion
Calculate the pH at equivalence point when 40.0 ml of 0.50 M aniline is titrated with 30.0 ml of 0.67 M HBr. For aniline Kb=3.8x10exp-10
An antacid tablet containing magnesium hydroxide as an active ingredient requires 22.6 mL of 0.597 M HCl for complete neutralization. What mass of Mg(OH)2 did the tablet contain?
Explanation for the Chemical Structure of Hydrocortisone, Can you please explain the chemical structure of cortisol and hydrocortisone? What is the difference on the structure? How many functional groups hydrocortisone has and what are they?
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