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In a coffee-cup calorimeter, 12.5 grams of CaCl2 are added to 138.0 grams of water at 24.2 degree Celsius. After all of the CaCl2 dissolves, the temperature of the solution is 32.9 degree Celsius. Calculate the enthalpy (in kJ/mole) for this reaction. Assume that the resulting solution has a specific heat of 4.18 J/g degree C.
Is temperature an important factor to consider when determining the Ksp (solubility product constant) when doing this titration
Calculate the standard reduction potential for the reaction for the reaction Cu(III) to Cu(II).
The pressure on 200 ml of oxygen gas changes from 380 mm hg to 760 mm hg. The temperature does not change. What is the new volume of the oxygen gas?
Sketch a titration curve of what the titration of the dry acid vs. sodium hydroxide might look like and explain the diagram.
A sample of unknown hydrate of FeCl3 weighs 8.693g. After heating the sample to constant mass, the remaining anhydrous salt weighs 5.216g. What is the experimental formula for the hydrate
Cesium atoms are the largest naturally occurring atoms. The radius of a Cs atom is 2.62angstroms. How many Cs atoms would have to be laid side by side to give a row of Cs atoms
calculate the volume of 1.42 M NaOH solution required to titrate 23.9 mL of a 1.5 M H3PO4 solution
A 125 lb patient is to receive a drug at a rate of 0.300 mg per 1.00 kg of body weight. If the drug is supplied as a solution containing 5.00 mg/mL, how many milliliters of drug solution should the patient receive
A student carried out the synthesis of aspirin starting with 3.48g of salicylic acid. After carrying out the reaction, recrystallizing and then drying the product, the student obtained 3.30g of aspirin. Calculate the student's percent yield.
If there is the possibilty that the container may rupture if the pressure exceeds 8.0 atm, at what temperature is rupture likely to occur?
When no single electronic formula can be drawn for a stable molecule so as to maintain the octet rule and still fit the observed properties
What was the percentage by mass of Mg(OH)2 in the original sample? [Hint: When Mg(OH)2 or Al(OH)3 reacts with HCl(aq), the products are a chloride salt, water and CO2(g). Assume that all of the CO2(g) leaves the solution without reacting.]
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