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Why is the Beer - Lambert law in units of absorbance rather than in units percent transmittance?
how fast must a 144.1g baseball travel in order to have a de Broglie wavelength that is equal to that of an x-ray photon with = 73 pm?
at 25degc hydrogen iodide breaks down very slowly to hydrogen and iodine ratekhi2. the rate constant at 25degc is 2.4
a 32.85-g sample of a solid is placed in a flask. toluene in which the solid is insoluble is added to the flask so that
During a quirky promotion by a discount sporting goods store, golf balls were given away free when purchasing Ping-Pong balls in bulk. An equal mass of golf balls was given away based on the mass of ping
A nucleus of mass number 27 contains 14 neutrons. An atomic ion of this element has 10 electrons in it. Write the symbol for this atomic ion
One of the sodium oxoacid salts of chlorine (there are 4 salts, each containing Na, Cl, and O) was analyzed. A 17.00 g sample was found to contain 3.68 g Na and 5.67 g Cl.
a sample of chloroform is found to contain 10.5 g of carbon 93.1 g of chlorine and 0.88 g of hydrogen. if a second
A sample of He gas (V = 3.0 L) at 5.6 atm and 25 °C was combined with 4.5 L of Ne gas at 3.6 atm and 25 °C in a 9.0 L flask (which was initially evacuated).
Which protein elutes first from a diethylaminoethyl cellulose ion exchange column with a decreasing pH gradient
for question 1, 2, and 3, show states of matter and charges where appropriate. Also find molecular equation, total Ionic Equation, and Net Ionic Equation.
A student determine the melting point of a substance to be 85.2 degrees Celsius. If accepted value is 53.7 degrees Celsius , the percent error in her determination was?
Calculate the number of moles of benzaldehyde and thiamine hydrochloride used in the Procedure. Explain why benzaldehyde is used for the theoretical yield calculation
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