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A sample of Br2(g) takes 38.0 min to effuse through a membrane. How long would it take the same number of moles of Ar(g) to effuse through the same membrane?
What is the ee?, The optical rotation of a compound is -165. What is the ee for a solution mixture with a measured rotation of -50?
After all the water is evaporated from 10.0 mL of a CsCl solution, 3.75 g of CsCl remains. Express the original concentration of CsCl solution in each of the following units.
What is the concentraion of toulene in this sample? Does this exceed the standard? (maximum contaminant level is 1.0 mg/L 6) How much calcium nitrate has to be added to 1000L of solution to provide 130ppm Ca^2+ if the water supply contains 40ppm Ca..
Which species is the best reducing agent?
A sample of sodium reacts completely with 0.426 kg of chlorine, forming 702 g of sodium chloride. What mass of sodium reacted?
Draw the structure of a phosphodiacylglycerol that has hexadecanoic acid and 9-octadecenoic acid
In analyzing a general unknown containing ions from several of the cation groups, a student treated the decante from Group II with Na3Co(NO2)6 and observed that a precipitate formed.
what mass of carbon dioxide will be produced if 144g of carbon react with 384g of oxygen gas according to the equation C + O2 --> CO2
at 25 C and 1.0 atm, .25 g of a gas dissolves in 1.00L of water. what mass of the gas dissolves in 1.00L of water at 25C and 3.0 atm
the weak base methylamine is titrated with 0.10 M HNO3. Calculate the pH after 20.0 mL and 60.0 mL acid addition (HNO3).
Find the mass in grams of PbCl2 in the products. In a test tube you have 1.0 mL of 0.10 M of NaCl mixed with 1.0 mL of 0.10M of NaCl. 2 NaCl + Pb(NO3)2 --> PbCl2 + 2 NaNO3
The reaction caused the temperature of the solution to rise from 22.06 C to 26.42 C. If the solution has the same density and specific heat as water, what is deltaH for this reaction (per mole of H2O produced)?
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