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A titration was performed on a 10.00-mL sample of water taken from an acidic lake. If it took 9.56 mL of 0.0412 mol/L NaOH(aq) to neutralize the sulphuric acid in the lake water sample, calculate the concentration of the sulphuric acid. What is the pH of this lake water?
Approximately 35 mg of a dried brass sample (accurately measured) is put into a 250-mL Erlenmeyer flask. About 20 mL of H2O and 10 mL of concentrated HNO3 is added.
State equations showing how to prepare each of the subsequent from benzene and any necessary organic or inorganic reagents. If an ortho para mixture is formed in any step of synthesis presume that you can separate the two isomers.
Use Coulomb's law to calculate the ionization energy in of an atom composed of a proton and an electron separated by 185.00 pm
Assume you dissolve 0.235 g of the weak acid benzoic acid, C6H5CO2H, in enough water to make 9.00 multiplied by 102 mL of solution and then titrate the solution with 0.148 M NaOH. C6H5CO2H(aq) + OH-(aq) = C6H5CO2-(aq) + H2O(l)
a mixture of carbon and sulphur has a mass of 9.0 g. complete combustion with excess oxygen gives 23.3 g of a mixture
The reaction is first-order in H2 and second-order in NO at a particular temperature. What is the rate law
An unknown oxide of mercury decomposes while heated to form mercury metal and oxygen gas. While a 1.048 g sample of this unknown is heated, 0.971 g of mercury remains. Compute the moles of mercury and moles of oxygen in the compound.
Calculate K for 2 NO(g) + O2(g) 2 NO2(g) from the observation that when equilibrium is established at 500 K, there are 0.190 moles NO2, 2.65 X 10-4 moles NO, and 0.606 moles O2 in a volume of 0.759 liters.
Celsius is allowed to expand into an evacuated vessel of 2.50 L volume. Does the gas do work? Explain
Bond length is the distance between the centers of two bonded atoms. On the potential energy curve, the bond length is the internuclear distance between the two atoms when the potential energy of the system reaches its lowest value.
A 25ml solution of quinine was titrated with 1.00 M hydrochloric acid, HCl. It was found that the soluiton contained 0.125 moles of quinine. What was the pH of the solution after 50 ml of the HCl solution were added? Quinine is monobasic with pKb=..
How many valence electrons are there for the POCl3 molecule? Draw a reasonable Lewis structure for POCl3. Assign formal charges for the atoms in your Lewis structure
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