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Problem- A sample of liquid copper required 254 kJ to vaporize the sample. Calculate the mass of copper vaporized. The heat of vaporization of copper is 4.81 kJ/g.
Mention all the steps and procedure to determine the correct value
Two isomeric compounds, A and B, are known to each have a monosubstituted benzene ring. Both have the formula C9H10O2 and both are insoluble in water. However, A dissolves in dilute aqueous NaOH, but B does not.
Explain how you might do this same titration if you did not have a pH meter. Why do you think that the sample titration curve of acetic acid titrated with NaOH would look different than a titration curve for the tirtration of phosphoric acid with ..
If a reaction was set up at 630K with initial partial pressures of methane of 105.1 torr and of 7.96 torr for I2. Compute the pressures, in torr, of all reactants as well as products at equilibrium.
Make a judgment as to the effectiveness of commercial liquid bleaches by noting the ingredients on the labels. Explain
Lead(II) sulfide was once used in glazing earthenware. It will also react with hydrogen peroxide (H2O2)to form lead(II) sulfate and water. How many grams of hydrogen peroxide are needed to react completely with 265 g of lead(II) sulfide?
A 50.0 ml aliquot of 0.1M NaOH is titrated with 0.1M HCl. Compute the pH of the solution after the addition of 0.00, 10.00, 25.00, and 40.00 ml of acid.
At a given temperature, the equlilibruin constant for the system studied in an experiement is 1.40x10^2. Suppose 100.0 ml of 2.00 x 10^-3 M KSCN was mixed with 100.0 ml of 2.00 x 10^-3 M Fe(NO3)3
a sample of gas 1.9 mol is in a flask at 21 degc and 697 mm hg. the flask is opened and more gas is added to the flask.
69.7 grams of a solute with a molecular mass of 2790 grams are dissolved in enough water to make 1.00 dm3 of solution
Explain what are the irreducible representations of these two RRs? (c) Based on your analysis above as well as considering the experimental spectrum which of these two geometries is most likely
The rate constant for decay of 45Ca20 is 4.233x10-3/day. What is the half-life of 45Ca20? a) 81.86 days b) 163.7 days c) 327.4 days d) 409.3 days e) none of these
A solution of H2SO4(aq) with a molal concentration of 3.58 m has a density of 1.200 g/mL. What is the molar concentration of this solution
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