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Calculate the mass of CuSO4*H2O needed to prepare 3.0 g of [Cu(NH3)4]SO4*H2O, assuming a 90% yield.
A student following the procedure of the experiment determining the molar mass of a volatile liquid by the dumas method obtaint the following data for an unknown volatile liquid
a piece of silver 25 g is heated to 100 degrees celsius then dropped into 42.5 g of water with a temperature of 21.7
calculate acidic and basic buffer capacity. How much of strong acid should be added to shift buffer pH one unit down, and how much of the strong base is needed to bring buffer pH one unit up?
The half-life for the radioactive decay of U-238 is 4.5 billion years and is independent of initial concentration. How long will it take for 10% of the U-238 atoms in a sample of U-238 to decay?
A certain substance has a heat of vaporization of 52.17 kJ/mol. At what Kelvin temperature will the vapor pressure be 4.00 times higher than it was at 291 K
a 40 gram sample of water at 25 degrees celcius absorbs 500 joules of energy. what is the final temperature of the water? the specific heat of water is 4.18 joules/g degrees C.
You titrated 1.740g of a solid unknown acid that wasdissolved in 100.0 mL of distilled water; the initial pH value was 2.5. You found that pH= pKa =4.2 when 12.50 mL of NaOH had been added. The concentration of the sodium hydroxide was 0.500M. Cal..
What is the average speed of the sprinter if A sprinter set a high school record in track and field, running 200. M in 22.0s .express your answer in kilometers per hour?
How many grams of P2O5 gas are present in a 750 ml container that is at 75 degrees C and at a pressure of 590 mm Hg?
Although the formula of this new chemical is a trade secret, it can be revealed that the formula for Herbigon is X-acetate (XCH3COO, where "X" represents the top-secret cation of the salt).
a strip of electrolytically pure copper weighing 3.178 gram is strongly heated in a stream of oxygen until it is all
Draw the accepted mechanism for each reaction and illustrate how each stereoisomer is formed in the reaction.
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