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The rate constants for the decomposition of acetaldehyde CH3CHO(g) -?CH4(g) + CO(g) were measured at five different temperatures. The data are shown in the table. Plot ln k versus 1/T and determine the activation energy (in kJ/mol) for the reaction. Note that the reaction is "3/2" order in CH3CHO so k has the units of 1/M1/2 s. Strategy: consider the Arrhenius equation written as a linear equation.
Given the following data for k (1/M1/2 s) : 0.011, 0.035, 0.105, 0.343, 0.789.
The corresponding values for T (K) are: 700, 730, 760, 790, 810.
Draw viable Lewis structures to illustrate how the element bromine can take part in an ionic bond, a pure covalent bond, and a polar covalent bond.
What is the concentration of hydroxide (OH1-) ions in saturated limewater if the [H3O1+] = 3.98 x 10-13? Is limewater acidic (A), basic (B), or neutral (N)
Identify the conjugate base of HSO4 - in the reaction H2PO4- + HSO4- ? H3PO4 + SO42- A) H2PO4- B) H2SO4 C) H2O D) H3PO4 E) SO42-
1.00 mol/s of methane (CH4) is combined with 2.00 mol/s of oxygen (O2) and completely combusted isothermally to CO2 and H2O vapor at 500°C and 1 atm. How much heat (in kJ/s) is required for this process.
If the pKa for acetic acid, found in commercial white vinegar is 4.754 at 298 K, then calculate the pH, percent ionization, and pOH of a 0.585 M acetic acid or 5% vinegar solution.
1. one of the standard solutions had an abnormally low absorbace reading causing a less positive slop for the
Adrenaline is the hormone that triggers release of extra glucose molecules in times of emergency or stress. A solution of .64g of adrenaline in 36g of CCl4 causes an elevation of .49 degrees C in the boiling point. What is the molar mass of the ad..
If a temperature scale were based on the freezing point (5.5 degrees celsius) and boiling point (80.1 degrees celsius) of benzene and the temperature difference between these points was divided into 50 units (called degrees X), what would be the f..
What is the value of the equilibrium constant for the neutralization of acetic acid with sodium hydroxide? The Ka for acetic acid is 1.8 ? 10-5 and the neutralization reaction of interest is CH3CO2H(aq) + NaOH(aq) -> H2O(l) + NaCH3CO2(aq).
Calculate the heat evolved per mole on combustion of each substance to yield {rm CO_2}(g) and {rm H_2O}(g).
Calculate the concentration of oxygen in water given that the Henry's law constant of oxygen is 4.259 ×104 atm and the partial pressure of oxygen is 0.2 MPa.
Concentrated acids and bases may fall outside this range. Calculate the pH of hydrochloric acid, if the solution is sold as 37 % by weight (37 g HCl / 100 g solution) with a density of 1.18 g/mL.
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