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What happened to the fabric strip when it was treated with the Test Identification Stain? How might this dye be used?
A piece of metal of mass 27 g at 105?C is placed in a calorimeter containing 49.2 g of water at 19?C. The ?nal temperature of the mixture is 30?C. What is the speci?c heat capacity of the metal.
Use Le Chatelier's Principle and the weak acid dissociation equilibrium to explain how the addition of NaOH will completely neutralize an unknown weak acid at the equivalence point in a titration. Consider that hydroxide ion reacts directly with H..
A scientist wishes to compress 50.0 ml of ammonia gas at normal atmospheric pressure to a volume of 1.0 ml. What pressure in atmospheres is necessary?
Calculate the standard reduction potential for the X half-reaction. The standard reduction potential of the copper half-reaction is 0.52 V. (Hint, write the half-reactions and the overall chemical equation for the spontaneous reaction.)
the reaction rate does not change when [B] increases from 1 M to 2 M. Which of the following is the correct rate law for the reaction?
2 g of a hydrocarbon fuel is burned in a colrimeter that contains 250 grams of water initially at 25 degrees celcius. After the combustion, the temperature is 26.55 degrees celcius.
if you have 330 ml of water at 25.00 and add 120ml of water at 95 C what is the final temperature of the mixture
A patient needs 2.80×10-2 of a sulfa drug. There are 8.00 tablets in stock. How many tablets should be given?
A sample of natural gas at STP is 78% CH4 and 22% C2H6 by volume. How many moles of each gas are present in 2.00 L of the mixture. Assume Ideal gas behavior.
What is the ratio of ionized to unionized molecules at pH 8.5. What percentage of the molecule is ionized at pH of 8.5
What is the pH of a solution resulting from the titration of 50 mL of 0.050 M formic acid solution, HCOOH, with 25 mL of 0.050 M NaOH solution? Calculate your answer to two decimal places.
The reaction A->B follows first-order kinetics with a half-life of 21.7 hours. If the concentration of A is 0.023 M after 48 hours, what is the initial concentration of A?
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