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Question: Ultrahigh vacuum is considered to be around 10-11 Torr. What is the mean free path of a molecule in such a vacuum?
What is the pH of the final solution when 25 mL of 0.022 M HCl has been added to 35 mL of ) .040 M HCl at 25 deg C
Mercury, with a freezing point of -38.8 degrees Celsius, is the only metal that is liquid at room temperature. How much heat energy must be removed from 1.00 mL of mercury at 23.0 degrees Celsius to produce solid mercury?
why does one begin a column elution with non polar solvents and progress to more and more polar solvents
State a baseball must weigh between 5.00 and 5.25 ounces (1 ounce =28.3g). Explain what is the wavelength of a 5.15 ounce baseball thrown at92mph
What is the name of the value that can be calculated that expresses with a number how precise and how accurate each group is?
If 4 liters per minute of 100 ppm 1,1,2-trichloroethane solution is to be reduced by 99% in a diffused air CSTR, what air flow is required if equilibrium is assumed. What air flow is needed for 90% removal.
What is the mass of 67.0 mL of ethanol. The density of ethanol at room temperature = 0.789g/mL
Ethyl butyrate was refluxed with 3mL butyryl chloride and 6mL ethanol for 1 hour. It was then recovered using 5mL ether and 5mL distilled water. Show what products formed at each step of the reaction and name the final compound(s).
What is the mass in grams of CO2 that would be produced if 52.0 g of C5H8O4 were allowed to react completely in excess oxygen?
Calculate the amount of of cobalt(II) nitrate hexahydrate [Co(NO3)2*6H2O] needed to prepare 50 mL of a .15 M cobalt(II) nitrate stock solution.
Determine the value of Kc for the following reaction if the equilibrium concentrations are as follows: [N2]eq = 3.6 M, [O2]eq = 4.1 M, [N2O]eq = 3.3 × 10-18 M.
Carbon monoxide gas burns in oxygen to form carbon dioxide gas. Write a balanced equation for the reaction and determine the volume of oxygen needed to react completely with 174 mL of CO at 40.0°C
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