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Presuming that the drug components of something we are experimenting with dissolves entirely when we stir the tablet with 1:1 ethanol/dichloromethane, Explain what would be solid that's left behind?
Pure olive oil has an iodine value of about 85. A very old sample or originally pure olive oil is found to have an iodine value of 55. Explain
Why is the first step in an electrophilic aromatic bromination reaction so much more endothermic than the first step in an electrophilic addition to an alkene
Explain how many half-lives must elapse before the activity of a radioactive isotope reduce to 1% of its initial value? Explain how long is this time for 87Rb, which has a decay constant of 0.1420 x10-10/yr?
what is the coefficient for carbon dioxide when the following equation showing the combustion of isopropyl alcohol
Common brass is a copper and zinc alloy containing 37.0% zinc by mass and having a density of 8.48 g/cm^3 . A fitting composed of common brass has a total volume of 128.0 cm^3
Work function of chromium metal is 4.37 eV. What is the wavelength of radiation that must be supplied to metallic chromium to release and electron with kinetic energy of 2.05*10^-18 J
If 4.0 g of hydrogen and 10.0 g of oxygen are mixed according to the equation 2 H2 + O2 = 2 H2O, which is the limiting reagent
The enthalpy of combustion for propane is -2044 kJ/mol. How many liters of propane (at STP) must be burned in order to convert 438 grams of ice initially at -6°C to liquid water at 64°C
The second time, 1.3mL is added to reach the end point. How would I calculate the molarity of the hydroxide ion (OH-) for the two tests
If 145.0 mL of 0.350 M lithium hydroxide is required to titrate 35.0 mL of an unknown monoprotic acid, what is the molar concentration of the unknown acid.
The activity of the mixed sample was found to be 4.35 x 107 dpm for a sample of 0.125 mg of Pu. Calculate the weight % of each Pu isotope present.
A chemist burns 0.8615 g of graphite (a form of carbon) in a new bomb calorimeter, and CO2 forms. If 393.5 kJ of heat is released per mole of graphite and T increases 2.613 K, what is the heat capacity of the bomb calorimeter.
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