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(NH4)2Cr2O7(s) ? N2(g) + 4 H2O(g) + Cr2O3(s) If 0.95 g of ammonium dichromate is used and the gases from this reaction are trapped in a 15.0 L flask at 23 °C, what is the total pressure of the gas in the flask? What are the partial pressures of N2 and H2O?
The vapor pressure of ethanol at 34.7 degrees Celsius is 100mmgh, and the heat of vaporization of ehanol is 38.6 kj/ mol. What is the vapor pressure of ethanol in mm Hg at 65.0 degree celcius
You are given an unkown acid H2A, which has two acidic protons per molecule. A 0.954-gram sample of this acid is titrated with .509M NaOH; complete neutralization of the acid requires 36.04mL of base, Find the molar mass of H2A.
Show the expected stepwise mechanism for the photochemical monochlorination of cyclohexane. Label the initiation, chain propagation
The enthalpy of combustion of benzoic acid (C6H5COOH) is commonly used as the standard for calibrating constant-volume bomb calorimeters; its value has been accurately determined to be 3226.7 kj?mol.
Saturated sodium chloride. describe what happens when 12 M HCl is added to saturated (5.4 M) NaCl. Calculate [Cl-] in the original solution and after the addition of the 12 M Hcl (before any precipitate forms).
What is the pH of the solution created by combining 1.70 mL of the 0.10 M NaOH(aq) with 8.00 mL of the 0.10 M HCl(aq)? with 8.00 mL of the 0.10 M HC2H3O2(aq)?
The vapour pressure of a substance at 20.0 oC is 49.3 kPa and its enthalpy of vaporisation is 40.6 kJ mol-1. Estimate the temperature at which its vapour pressure is 80.0 kPa
A certain substance has a heat of vaporization of 39.17 Kj/mol. At what kelvin temperature will the vapor pressure be 6.50 times higher than it was at 325k?
Order the following elements according to decreasing electronegativity: C, Ca, Cs, Cl, Cu.
A process involving a perfect gas is carried out in which the temperature changes at constant volume. First, the process is carried out for a fixed value of ?T and the mass of the gas is doubled. Then, the process is repeated with the same initial..
Find the pH during the titration of 20.00 mL of 0.1000 M butanoic acid, CH3CH2CH2COOH (Ka = 1.54 x 10^-5), with 0.10 M NaOH solution after the following additions of titrant. a.) 15.00 mL b.) 20.90 mL c.) 27.00 mL
Which of the following will not have ionic bonds?
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