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What mass of sodium cyanide must be added to 250ml of water in order to obtain a solution having a pH of 10.50? Ka(HCN) = 4.9 x 10 ^-10
One adds 25.00 mL of the solution in # 26 above to a 100 mL volumetric flask and adds enough water to fill the flask to the mark with stirring. (a) What is the molarity of the resulting solution
Why should the flask be immersed in boiling water as much aspossible? What effect will it have in determining the molecularweight? Explain.
Two chromatographic columns (GC) are being compared for use in an analysis. One is a 50 cm long packed column that is 5 mm in inside diameter (ID), with a stationary phase that is 1um thick on the support packing and has a total of 25,000 theoreti..
Calculate the theoretical yield of C2H5Cl when 124 g of C2H6 reacts with 219 g of Cl2 , assuming that C2H6 and Cl2 react only to form C2H6Cl and HCl.
Calculate the initial effusion rate. If this rate continued how much time would pass until the pressure dropped to 0.90 bar? (actually the rate changes with pressure- indicated why using the equations). assume values for nitrogen
explain the difference in boiling point between the isomers 1-chlorobutane and 2-methyl-2-chloropropane in terms of structure.
Why are unsaturated carbonyl compounds UV active but saturated esters and ketones are not UV active
The total pressure in a flask containing air and ethanol at 257C is 878 mm Hg. The pressure of the air in the flask at 257C is 762 mm Hg. If the flask is immersed in a water bath at 350C
find the probability of finding an electron in a 10 nm one dimensional box between 0.1 nm and 0.2 nm.
celsius absorbs 281kJ of heat from a mountain climber's stove at an elevation where the boiling point of water is 89 degrees celsius, how many kJ are required to boil the water?
In a controlled greenhouse at 30.0C and 1.0 atm a crop of seeding tomato plants was found to consume 380 L of carbon dioxide gas during photosynthesis. Assuming 100% yield what a mass of glucose was produced for the growing plants?
Aluminum metal is made industrially by electrolysis of Al2O3 dissolved in molten Na3AlF6. How many grams of Al metal are produced when 8.80 X 103 coulombs pass through the cell?
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