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What is a suitable solvent system to perform a thin layer chromatography test for 7-dehydrocholesterol in absolute ethanol?
What is the pressure (mmHg) if 800 kPa is increased in volume from 1.75L to 3.0L and the temperature is increased from 65degrees Celsius to 100degrees Celsius
Calculate the amount of heat liberated (in kJ) from 355 g of mercury when it cools from 76.0°C to 13.0°C.
Then draw the substitution product formed when this enantiomer reacts with NaCN in DMSO, and indicate the stereochemistry of the product.
Calculate the partial pressure (in atm) of HBr at equilibrium when 5.00 atm of CH3Br and 5.00 atm of H2O react at 1000 K according to the following chemical equation
For each of the subsequent state a balanced chemical equation to represent the dissociation of the compound when it is dissolved in water. If the compound wouldn't dissociate write NRX.
The precipitate formed was washed and dried .Its mass was 0.287g.Find the mass of NaCl in the initial sample.
A CD player and its battery together do 500 kJ of work, and the battery also releases 250 kJ of energy as heat and the CD player releases 50 kJ as heat due to friction from spinning
Iron and oxygen react to form iron(III) oxide; 4Fe(s)+3O2(g)-->2Fe2O3(s). Determine the limiting reactant in each of the following mxtures of reactants
What was the pressure of the sample when it was unloaded in Urbana the next day and the temperature was a typical 31.7oC
The equilibrium constant Kc for this reaction is 1.2 102 at 150°C. What is the direction (forward or reverse) needed to attain equilibrium at 150°C
What is the pH (to nearest 0.01 pH unit) of a solution prepared by mixing 87.0 mL of 0.0601 M NaOH and 71.0 mL of 0.0138 M Ba(OH)2
A 9m^3 room contains a canister of CO2 with a faulty valve. At a level of 75 mole % CO2, breathing the air becomes lethal. The room temperature is 25 degrees Celcius.
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