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What mass of ammonium chloride should be added to 2.55 L of a 0.165 MNH3 in order to obtain a buffer with a pH of 9.45?
degrees Celsius to a final volume of 34.6 L. During the expansion the gas cools to 12.0 degrees celsius. what is the final pressure?
the land area of greenland is 840000 mi2 with 132000 mi2 free of ice. the average thickness of ice is 5000 ft. the
For a zero order process, mathematically derive the first half-life equation involving the evaporation of fingerprints organics from the scene of a crime.
The procedure (paragraphs 2 and 3) states that the additions of bromobenzene, methyl benzoate and hydrochloric acid must be done slowly. What might happen if any of these were done too rapidly
the given chemical reaction is 2nh3g n2g 3h2g. in this the equilibrium is to be-2 established in a container of 1.0
When C2H5OH +3O2 produces 2CO2 + 3H2O,determine how many grams of oxygen gas are essential for complete combustion of 421grams of ethanol ?
describe the mechanisms of sn1 and sn2 reactionsand summarize the nucleophile electrophile and solvent characteristics
Calculate the pH when 27.6 mL of 0.048 MHCl is added to 100.0 mL of the above buffer.
A 5.50 g sample of an unknown is dissolved in 251. g of benzene. The freezing point of the solution is 1.02 C below the normal freezing point of pure benzene.
A 3.00-L flask is filled with gaseous ammonia,NH3 . The gas pressure measured at 20.0 deg C is 2.05 atm . Assuming ideal gas behavior, how many grams of ammonia are in the flask?
Calculate the empirical formula for the following compound: potassium tartrate found in baking powder: 20.8% K, 2.7% H, 25.5% C, and 51.0% O
Determine the pH of an HF solution of each of the following concentrations: a) 4.60 x 10^-2 b) 2.30 x 10^-2
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