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explain methods of industrial preparation of alcohol............................................................................................................................................................................................................................................................................................................................................................................................
A .750 L volume of gas at 308.0 torr and 51.00 degrees C is heated until the volume of the gas is 2.000L at a pressure of 718 torr. What is Tfinal of the gas?
A 17.0-g sample of ice at -19.0°C is mixed with 101.0 g of water at 87.0°C. Calculate the final temperature of the mixture assuming no heat loss to the surroundings.
A coffee-cup calorimeter contains 140.0 g of water at 25.2 *C. A 122.0 g block of copper metal is heated to 100.4 *C by putting it in a beaker of boiling water.
2 Al2O3(s) → 4 Al(s) + 3 O2(g) . ?H = +3339.6 kJ/mol What is ?H for the formation of one mole of Al2O3(s) from the elements?
What is the volume of a container that contains 12.4g of a substance having a density of 0.898g/cm3
Calculate the gas NH3 in ppm over NH4OH solution.The density of the solution is 0.9g/ml and the Commercial concentrated aqueous ammonia is 29%.
A solution is prepared by mixing 50.0 mL of 0.11 M Pb(NO3)2 with 50.0 mL of 1.3 M KCl. Calculate the concentrations of Pb2+ and Cl - at equilibrium. Ksp for PbCl2(s) is 1.6* 10-5.
What amount of the excess reagent remains after the reaction is complete in grams?
calculate the molar mass of a sample if a simgle molecule weighs 8.90 x 10-23
The half-life for the reaction at 550 C is 81.3 seconds. How long does it take for 78.5% of a phosphine sample to decompose?
An enzyme reaction, in 2ml of 0.08 M of an acetate buffer, pH=4.76. During this reaction 2micromol H+ was produced
The stock solution is 500 ?g/mL and you want to obtain a final concentration of 1?M. What volume of the stock solution do you need to make 10 milliliters of the 1 ?M solution? Also: What is the molar mass of PMA?
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