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A system consists of a copper tank whose mass is 29 lbm, 9 lbm of liquid water, and an electrical resistor of negligible mass. The system is insulated on its outer surface. Initially, the temperature of the copper is 81°F and the temperature of the water is 122°F. The electrical resistor transfers 95 Btu of energy into the system. Eventually the system comes to equilibrium. Determine the final equilibrium temperature, in °F.
In the laboratory we may prepare a sodium hydroxide solution by dissolving 2.0 grams of sodium hydroxide into enough DI water to give a total volume of 500ml. What are the [OH-], the [H3O+] and the pH of the resulting solution?
Explain why gas chromatography usually ramp(increase) the oven temperature during an analysis
For a particular chemical reaction deltaH = -5.5kJ and deltaS = -25J/K. Under what temperature condition is the reaction spontaneous
A sample of oxygen gas is collected over water at 23 Celsius at a barometric pressure of 751mmHg (the vapor pressure of water at 23 Celsius = 21mmHg). The partial pressure of oxygen gas in the sample collected is
A 325-mL sample of solution contains 25.3 g of CaCl2, which is fully dissolved. Calculate the molar concentration of Cl- in this solution.
write a detailed mechanism for the reaction of salicylic acid with acetic anhydride showing clearly the function of the catalyst,
A gas sample has an original volume of 650 ml when collected at 750 mm and 30°C. If a change is made in the gas temperature which causes the volume of the gas sample to become 800 ml at 1.00 atm, what is the new temperature
Consider the reaction that describes the Haber process for the production of ammonia: for which Kc at 300oC is 9.5. Calculate Kp for this reaction at 300oC.
When the reaction A--> B + C is studied, a plot of [A]t vs. time gives a straight line with a negative slope. What is the order of the reaction
A neon sign is made of glass tubing who's inside diameter is is 2.5cm and whose length is 5.5m. If the sign contains neon at a pressure of 1.78 torr at 35 degrees Celcius, how many grams of neon are in the sign
A flask contains 10.0 mL of HCl and a few drops of phenolphthalein indicator. The buret contains 50.0 mL of 0.230 M NaOH. what volume of NaOH is needed to reach the end point of the titration
at 25 degrees celsius the concentration of n2 in h2o was determined to be 7.2 x 10-6m. compute the partial pressure of
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