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Suppose that 1.08 g of rubbing alcohol (C3H8O) evaporates from a 75.0 g aluminum block.
If the aluminum block is initially at 25 C, what is the final temperature of the block after the evaporation of the alcohol? Assume that the heat required for the vaporization of the alcohol comes only from the aluminum block and that the alcohol vaporizes at 25 C.
Consider the electronic transition from n = 4 to n = 1 in a hydrogen atom, and select the correct statement below.
calculate the mass of water that must be added to 0.45 mol of glucose to make a solution of 15.0 percent by mass. the molar mass of glucose is 180 g/mol
Draw the Lewis dot structure for the HI molecule. Give the shape of the molecule in electron-domain geometry and molecular geometry.
a running track measures 1056 ft per lap. to run 15.0 km how many laps should you run? How do you break the equation down into a solution map?
The amino acid histidine has three pKa's at 1.8, 6.0 and 9.3. In a 0.01 M solution of histidine, what is the concentration of protonated carboxylic acid at pH 7.4? The primary amine? The side chain?
A sample of gaseous C2H2 (acetylene, or ethyne) was stored for one year, yet at the end of this period the sample remained unchanged and no graphite or hydrogen gas had been formed. Briefly explain why there is no inconsistency between the sign of..
A gaseous mixture containing 0.220 mol fraction of carbon tetrachloride (CCl4) and 0.780 mol fraction of dry air is initially at 60.0°C and 1127 mmHg.
Explain the purpose of the "Thermodynamic properties of Urea " Experiment. Also , ca you please tell me any possible sources of error
A solution containing a mixture of metal cations was treated with dilute HCl and a precipitate formed. The solution was filtered and H2S was bubbled through the acidic solution.
MnO2 is oxidized to MnO4 and Cu2 is reduced to Cu . Complete and balance the equation for this reaction in acidic solution. Phases are optional.
If 3.0g of N2 gas has a volume of 0.50 L and a pressure of 5.0 atm, what is its Kelvin temperature
Phenolphthalein is one of the most common indicators. What are its colors in acidic and in basic solutions?
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