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Polonium has a density of 9.4 g/cm3. Explain what is the mass, in kg, of a polonium brick measuring 834.1430 feet by 5.11230feet by 1433.20 feet?
What is the buffer capacity of the resulting solution. (The buffer capacity is the number of moles of NaOH that must be added to 1.0 L of solution to raise the pH by one unit)
In the lower troposphere, ozone is one of the components of photochemical smog. It is generated in air when nitrogen dioxide, formed by the oxidation of nitrogen monoxide from car exhaust, reacts by the following mechanism.
You will standardize the NaOH solution by titrating a weighed sample of potassium acid phtalate, KHC8H4O4 (MM=204.32g/mol). Calculate the mass that will require 20mL of base of the above calculated concentration.
In some cases a Br-Br bond can be broken by the absorption of photons of light energy. Br-Br bond energy is 192 kj/mol determine the photon energy and the wavelength (in nanometers) associated with breaking this bond.
If delta H is negative and delta S is positive, which of the following is true? a) The reasction os never spontaneous, b) the reaction is always spontaneous
How high must a waterfall be for the water to change temperature by 0.1K during its fall (assuming no evaporation)
A 270- flask contains pure helium at a pressure of 761 . A second flask with a volume of 455 contains pure argon at a pressure of 730 . If the two flasks are connected through a stopcock and the stopcock is opened, what is the partial pressure of ..
Calculate the molar solubility of thallium chloride in 0.20M NaCl at 25 degrees Celcius. Ksp for TICl is 1.7 x 10 -4. What volume of 0.500 M HNO3 is needed to titrate 60.00 mL of 0.500 M Ca(OH)2 to the equivalence point?
how do you think the appropiate enzyme would have affected the reaction (degree of completeion,yield,stereochemistry
7 years old Samatha Tredeau has a severe headache and stiff neck. Freshly, has a neurosurgery, she is now feeling nausea as well as having a fever. The intern that checks her finds a possibility of urinary tract infection
What are the van't Hoff factors of C2H5OH (no dissociation), NaCl (full dissociation), Na2CO3 (full dissociation) and H2SO4 (64% dissociation)
Provide structures of the two allylic free radical intermediates in this reaction. b. Provide structures of the two substitution products in this reaction. c. Identify and circle the major product in (b) above.
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