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A 19.2 g quantity of dry ice (solid carbon dioxide) is allowed to sublime (evaporate) in an apparatus like the one shown in Figure 6.5. Calculate the expansion work done in kJ against a constant external pressure of 0.961 atm and at a constant temperature of 20°C. Assume that the initial volume of dry ice is negligible and that CO2 behaves like an ideal gas.
A 24.7 g sample of pure iron at 61°C is dropped into 99 g of water at 25°C. What is the final temperature of the water-iron mixture?
Electrons are ejected from sodium metal by any light that has a wavelength shorter than 544 nm. What is the kinetic energy of an electron
If 5.00 g Br2 and 3.00 g NH3 react according to the equation below, what is the maximum mass of ammonium bromide produced?
One reason you do this is to help minimize the potential side reaction that forms byphenyl. How does the additional 30 mL of anhydrous diethyl ether minimize the formation of the biphenyl side product?
A balloon is filled to a volume of 7.00 x 102 mL at a temperature of 20.0 oC. The balloon is then cooled at constant pressure to a temperature of 1.00 x 102 K.
A cylinder with a moveable piston contains 0.84 mol of gas and has a volume of 328 mL. What will its volume be if an additional 0.27 mol of gas is added to the cylinder? (Assume constant temperature and pressure.)
How much time (in minutes) will it take for the water heater to heat the 5.5 Liters of water from 23 Celsius to 49 Celsius?
at constant volume, the initial pressure of a substance is 0.63 atm and the initial temperature is 283 k.calculate the pressure of the substance at 295 k.
In the neutralization reaction: HCl (aq) + NaOH (aq) = NaCl (aq) +H20, 25.0 mL of 0.212 M NaOH is neutralized by 13.6 mL of an HCl solution. The molarity of the HCl solution is ?
Match the detector or detectors that can be used in gas chromatography for the detection of the following list of analytes. (More than one detector may be appropriate for a given analyte, and a given detector may be appropriate for more than one g..
What is the difference between the fresh meat with added sodium nitrite and the meat with added sodium nitrite plus sodium erythorbate?
Trehalose is the major sugar in the hemolymph (blood) of many insects. Insects have open circulatory systems that bathe the tissues of the animal.
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