Calculate final temperature when ice placed in styrofoam cup
Calculate the final temperature when a 25.5 gram sample of ice at 0oC is placed into a styrofoam cup containing 116 grams of water at 71.9 oC. Assume that there is no loss or gain of heat from the surroundings.
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65.50 mL of 0.161 M HF is titrated with 0.1200 M NaOH. How many mL of the base are required to reach the equivalence point? (Ka for HF is 6.8 x 10-4)
How many grams of dry NH4Cl need to be added to 2.40 L of a 0.400 M solution of ammonia, NH3 , to prepare a buffer solution that has a pH of 8.58? Kb for ammonia is 1.8*10 ^-5.
If 12.6 grams of iron (III) oxide reacts with 9.65 grams of carbon monoxide to produce 7.23 g of pure iron, what are the theoretical yield and percent yield of this reaction? Be sure to show the work that you did to solve this problem
Why do we assume that the extra electrons in I3- must be placed on the central Iodine atom to exceed the octet rule? Is there any reasoning/theory that discourages the electrons being placed on the non-central atoms(if any)?
Calculate the final temperature when a 25.5 gram sample of ice at 0oC is placed into a styrofoam cup containing 116 grams of water at 71.9 oC.
What horsepower is added to water to pump it vertically through a 200-ft-long, 1.0-in.-diameter drawn tubing at a rate of 0.060 ft3 s if the pressures at the inlet and outlet are the same? 8.62 Water flows from a lake as is shown in Fig. P8.
Assume you prepare the sample corresponding to line 1 in the first table of the Calculations section. If the measured concentration of I3- turns out to be 1.30x10-5 M, what is the equilibrium coefficient?
What volume of 0.240 M CaCl2 must be added to 335 mL of 0.189 M KCl to produce a solution with a concentration of 0.245 M Cl-? Assume that the solution volumes are additive.
Will a battery last longer if I charge it with a high current for a short time, or is it better to charge the battery with a low current for a long time to get the most energy? Our project will answer this question. We also hope to propose s
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