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A sample of KClO3 was heated and 350. mL of O2 was collected over water. What mass of O2 was collected? Room T = 23°C, P =675. mmHg.
When comparing the experimental IR spectra to the literature IR spectra of the same compound, the positions and strengths of some of the peaks were slightly different. Why is this so?
The vapor pressure of chloroform is 40.0 torr at -7.1 degree Celsius. Its enthalpy of vaporization is 29.2 kJ/mol. Calculate its normal boiling point.
Calculate the mass of gold in 20.0 mL of 1.0 mM HAuCl_4. What is the theoretical number of 13 nm nanoparticles that could be formed in this solution?
Aluminum reacts with excess hydrochloric acid to form aqueous aluminum chloride and 35.8 mL of hydrogen gas over water at 27 degrees C and 751mmHg. How many grams of aluminum reacted.
What is the maximum body accumulation of methylmercury at a constant ingestion rate of 4 mg of mercury per day?
Chymotrypsin is initially synthesized as an inactive precursor, chymotrypsinogen. How is it activated and what are the advantages and disadvantages of this type of activation?
Define in one or two sentences the following terms + Indicate one step in glycolysis in which they are significant. kinetic perfection and substrate level phosphorylation.
In a titration of HCL, I have a molarity of 0.991 NaOH and a volume of 7.6 mL to reach an equivalence point for the titration. I need to figure out the number of moles of NaOH from these figures. Pl
A mixture of these these gases has a total pressure of 1,380 mmHg at 298 K. The mixture is analyzed and is found to contain 1.27 mol CO2, 3.04 mol CO, and 1.50 mol Ar. What is the partial pressure of
If technetium-99 has a half-life of 6.0 hours, what percent of an administered dose of 100 mg of technetium-99 remains in the patient's body after 48 hours?
How many photons are striking each cm2 in 1.0 minute? Assume the wavelength of sunlight absorbed is 460 nm.
Silicon Carbide, which has the emperical formula: SiC, melts at 2830 deg C. and is nearly as hard as boron nitride and diamond. Which category of substances does it most likely fit under?
What is the side reaction that occurs or what side products are generated during a thiamine catalyzed benzoin condensation reaction
When trimethylamine, (CH3)3N, dissolves in water, it partially ionizes, producing the trimethylammonium ion, (CH3)3NH+. What effect, if any, would dissolving trimethylammonium chloride [(CH3)3NHCl], a
A ship leaves port and travels due east 15 nautical miles. How would you find the bearing to the port of departure, andhow would you draw the diagram for this problem.
The temperature of a 500.mL sample of gas increases from 150. K to 350. K. What is the final volume of the sample of gas, if the pressure in the container is kept constant?
A 0.9157-g mixture of CaBr2 and NaBr is dissolved in water, and AgNO3 is added to the solution to form AgBr precipitate. If the mass of the precipitate is 1.6930 g, what is the percent by mass of Na
A thin lead apron is used in dental offices to protect patients from harmful X rays, If the sheet measures 75.0 cm by 55.0 cm by 10.cm, and the density of lead is 11.3 g/cm^3, what is the mass of th
A security camera is mounted 9 feet above the floor. What angle of depression should be used if the camera is to be directed to a spot 6 feet above the floor and 12 feet from the wall?
The height is 30 cm.The trough is not full. Give an expression for V, thevolume of water in the trough in cm3, when the depth of the water is d cm.
You need to produce a buffer solution that has a pH of 5.23. You already have a solution that contains 10 mmol (millimoles) of acetic acid. How many millimoles of acetate (the conjugate base of acet
The mass of a proton is 1.007825 amu and the mass of a neutron is 1.008665 amu. What is the nuclear binding energy of 1 atom of 210Bi, which has a mass of 209.9891 amu?
The far point of an eye is 190 cm. A corrective lens is to be used to allow this eye to focus clearly on objects a great distance away. What should be the focal length of the lens?
Any change in the volume of the solution due to the addition of solid potassium formate is insignificant. (Ka for HCOOH = 1.8 x 10^-4)