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The concentration of a dye and concentration of bleach (NaOH) was determined experimentally by using Beer's Law. The rate constant is unknown. How do you calculate the reaction rate based on the gr
A solution is prepared that initially contains 0.10 M Ag+(aq) and 0.80 M NH3 (aq). The Kf for the formation of Ag(NH3)2+(aq) is 1.7 x 10^7. Write the equilibrium equation that represents the
A a student started with a mixture weighing 1.356 gm. The student recovered 1.543 g . Assuming that all calculations were done correctly what was the most likely source of error in the experiment.
Iron sulfide, FeS, is a sparingly soluble salt with a Ksp of 6.3 x 10^-18. Calculate the molar solubility of iron sulfide in a solution that is saturated with hydrosulfuric acid, H2S ( [H2S] = 0.1
The Ka's for the three acidic protons of phosphoric acid H3PO4 are: 7.11 x 10-3, 6.32 x 10-8, and 4.5 x 10-13. It may be helpful to write out the three dissociation reactions along with their Ka's a
A 12.0g sample of 24Na is prepared at 8:00am of Tuesday for a circulation test. Unfortunately, the doctor forgot to sign the forms and couldn't be reached until Thursday at noon.
What are the resonance structures and intermediates in the formation of bromoacetanilide from the reaction of acetanilide and bromine liquid with acetic acid?
What is the composition of the vapor of a pentane-hexane solution that has a vapor pressure of 357 Torr at 25C vapor pressures at 25 C= pure pentane is equal to 511 torr, pure hexane equals 150 torr
A solid consists of a mixture of NaNO3 and Mg(NO3)2. When 6.50 g of the solid is dissolved in 50.0 g of water, the freezing point of the solution is lowered by 5.37 C. What is the composition by mas
What was the percentage by mass of Mg(OH)2 in the original sample? [Hint: When Mg(OH)2 or Al(OH)3 reacts with HCl(aq), the products are a chloride salt, water and CO2(g). Assume that all of the CO2(
What mass of salicylic acid is needed to produce one extra strenght tablet of aspirin if the reaction has 60% yield. Please show work and correct sig figs.
The standard free energy of activation of a reaction A is 77.7 kJ mol-1 (18.6 kcal mol-1) at 298 K. Reaction B is one million times faster than reaction A at the same temperature.
What is the internal energy change of a gas gives off 312 of heat while being compress 862mL by a pressure of 1.64 bar? What are internal energy change in surrounding and universe for the process?
What is the enthalpy change corresponding to the melting of 2.5 moles of H2O? what is the system? What is the surrounding? In what direction does the heat flow?
If temperature and pressure remain constant, how does the volume of gas sample vary with the number of moles of gas present
Imagine two solutions with the same concentration and the same boiling point, but one has benzene as the solvent and the other has carbon tetrachloride as the solvent. Determine that concentration
Use the answer to (a) calculate the first approximation to the correction term and then use successive approximations to obtain a numerical answer for part (b).
A strip magnesium of mass 15g is dropped into beaker of dilute hydrochloric acid. Calculate the work done by the system as a result of the reaction. The atmospheric pressure is 1.0 atm and the temp
A solution is initially 0.050M in acetate, CH3COO- (Kb = 5.6 x 10^-10). 10.0mL of 0.10 M HCl is added. Write the chemical equation for the nuetralization reaction that occurs.
A sample of 1.0 mole of a perfect gas with cp= 20.8 J K-1 is initially at 3.25 atm and 310K. If it undergoes reversible adiabatic expansion until its pressure reaches 2.50 atm.
How does this information relate to the fact that cyclobutane is not a planar molecule, but has one carbon bent about 25 degrees out of the planar of the other three?
Salt, NaCl, has a solubility of 35-7g per 100g of water at 0 degree celsius. The solubility of salt in water does not vary appreciably with temperature.
At 80C the vapor pressures of pure liquids X, Y, and Z are 385, 190, and 66 mmHg respectively. what pressure must be exerted on the surface of a solution containing one mole of X, three moles of Y,
Calculate the amount of isopentyl acetate that should be present in the reaction mixture at equilibrium based on 300 mmol of acetic acid and 150 mmol of isopentyl alcohol as starting quantities.
Ethanol (C2H5OH) melts at?114°C and boils at 78°C. The enthalpy of fusion of ethanol is 5.02 kJ/mol, and its enthalpy of vaporization is 38.56 kJ/mol. The specific heats of solid and liquid