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Calculate the heat of a reaction if 12.5 g CaCl is dissolved in 105 g of water and the temperature decreases from 22 degrees C to 15 degrees C. Assume the specific heat of the solution is 4.184 J/g degrees C. Is the reaction endothermic or exothermic
Consider the change in entropy change that occurs when a box of coins that contains a perfectly ordered array of three moles of coins is shaken. Calculate the entropy of the ordered coins, and then calculate the entropy after the box has been shak..
The AM station KBOR plays your favorite music from the 20s and 30s at 1290 kHz. Find the wavelength of these waves
Calculated percentage of alcohol in the patient's body the, State the chemical reaction that took place in the patient's body.
calculate the molality of a sucrose c6h22o11 solution containing 14.3 g of sucrose in 676 g of
Water and 8 mol/L potassium nitrate solution are mixed to produce 700mL of a solution with a concentration of 6.mol/L. What volumes of water and potasium nitrate are used.
The following data were obtained when measuring the delta H of neutralization for the reaction of HCl with NaOH.
Briefly explain whether the following procedural errors would result in either an incorrectly high or incorrectly low calculated percent Cu recovery for this experiment.
256 grams of sodium chloride reacts with an excess of calcium oxide. How many grams of sodium oxide are produced?
How fast must a 50.2-g tennis ball travel to have a de Broglie wavelength equal to that of a photon of green light (5400 Å).
Describe how you will prepare the 1.00 x 10-3 M phosphate solution using the phosphate stock solution provided (1.00 x 10-1 M) to create a 200 mL of 1.00 x 10-3 M phosphate solution.
Calculate the number of theoretical plates N in the column of length L in 20 cycles. The observed resolution is 1.81. B) Now, calculate the plate height in the column in m.
Calculate the rms (average) speed of ClO2 atoms or molecules at 297 oC. Use R = 8.314 kg-m2/K-s2-mol for the value of the gas constant.
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