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How can describe the pH of a buffer solution that contains 0.17 M sodium benzoate (C6H5COONa) and the 0.87 M benzoic acid (C6H5COOH)? Where the Ka=6.5 x10-5 for benzoic acid.
If 100 grams of calcium hydroxide (mild base) are added to a beaker which is having the 50.0 grams of hydrochloric acid, will all of the calcium hydroxide be neutralized? If not, discuss how much wi
Write down the equation for the formation of the precipitate produced in the test tube which is having the calcium hydroxide in the synthesis of ethanol reaction.
Create the 90 % confidence interval with margin of error for proportion of all adults who are smokers? What must be minimum sample size to keep Margin of error under 1%?
Is this a radix reaction? Explain what mass of rust can be removed by the 500 mL of 0.15 M solution of oxalic acid? Rust stains can be removed by washing a surface with a dilute solution of oxalic a
Identify the oxidizing and reducing agent in the reaction. In carnations of a chlorine containing toxic waste such as polychlorinated biphenyl (PCB) produces CO2 and HCL:
Discuss whether the solubility of potassium bitartrate should change when the concentration of KNO3 (aq)changes.
How can estimate the entropy change when the 4.51 mol of an ideal gas expand sat a constant temperature from 17.5L to a final volume of 75.4L in joules/K.
Supposing no air drag, determine the rocket’s kinetic energy if it is 1000 km over the surface of Earth.
Discuss how much energy is released when the15.3 g of steam at 113.0°C is condensed to give liquid water at the 78.0°C? The heat of vaporization of liquid water is 40.67 kJ/mol, and the mol
A hiker of 200 lb having a backpack of 50 lb hikes from 1 camp at 10,000 ft altitude to camp 2 at 13,300 ft in 8 hours. Determine how much net work is done?
Determine the numbers of un-hybridized d-orbitals are on the central atom of SeCl2? Explain what kind of hybrid orbitals does PF3 use in the bond formation?
Two objects attract each other having a gravitational force of magnitude 9.90 x 10-9 N when separated by 19.6 cm. When the net mass of the objects is around 5.09 kg, determine the mass of each?
When and electron relaxes from the n=2 level to the n=1level in the H atom, how do you calculate the energy of the light emitted in (Kj/mol).
Determine the average atomic mass of M when the M2S3(s) is heated in air, it is converted to MO2(s) and a 4.200 g sample of M2S3(s) shows a decrease in the mass of 0.239 g when it is heated in air.
If the dissociation of any H2 molecule were accomplished by the absorption of a single photon whose energy was exactly the quantity required, explain what would be the wavelength in meters?
Determine the pH of the solution after the addition of 29.7mL of NaOH solution? Consider the titration of the 50.0 mL of 0.217 MHN3 (Ka = 2.6 * 10 ^ -5) with 0.183NaOH.
Calculate the molarity of Cl- in this solution when a solution is prepared by dissolving the 23.7g of CaCl2 in the 375 g of water and the density of the resulting solution is 1.05 g/ml.
An electron in hydrogen absorbs a photon having a wavelength of around 19.1 µm and ends up in the n = 8 state. Determine the initial state of the atom?
As number of persons making trip is 13 less capacity of bus, it costs P8 more per student than if bus is filled. Find number of students in trip?
Determine the energy required in Kj/mol to remove the electron from the n=1 level of the hydrogen atom, this ionization is the transition of the electron from the n=1 to the n=infinity level?
A rotating wheel needs 5.00 s to rotate 26.0 revolutions. Its angular velocity at the end of the 5.00 s interval is around 95.0 rad/s. Determine the constant angular acceleration (in rad/s) of the w
Explain what mass of oil must be burned to yield the number of joules in the b if the combustion of oil yields 5.0 x 104kJ/kg.
An uncharged capacitor is joined to a battery of 40.0 V until it is completely charged, after which it is detached from the battery. A slab of paraffin is then inserted among the plates.
Tom evaluated that he biked five times faster than he walked. If complete trip took him 5 hours and 24 minutes, find his walking and riding speeds?