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Suppose that 1.02 of rubbing alcohol evaporates from a 75.0 aluminum block. If the aluminum block is initially at 25C, 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 25C.
What values are quoted in handbooks for common hydrates of your cation?
Consider a molecule with spacing between two energy levels of 0.250 kJ mol-1. Calculate the wavelength and wavenumber of the photon that would be needed to lead to an excitation between these two levels.
In a particular titration experiment a 25.0 mL sample of an unknown monoprotic acid required 30.0 mL of .200 M NaOH for the end point to be reached
In the above system, if lead nitrate is added to sodium chromate, what concentration of lead nitrate is required to begin formation of a precipitate? CHOOH(aq) + H2O(l) CHOO-(aq) + H3O+(aq)
Please review the occurrence and cycling of calcium in nature, along with its use. Analyze and evaluate the article as to it's contemporary relevance regarding the elements availability, health implications and environmental impact.
Fluorine-18, which has a half-life of 110 min, is used in PET scans. If 123 mg of fluorine-18 is shipped at 8:00 a.m., how many milligrams of the radioisotope are still active if the sample arrives at the radiology laboratory at 1:30 p.m.?
what is the percent yield of a reaction in which 262 g phosphorus trichloride reacts with excess water to form 102 g
what is its empirical formula. A 0.2000 gram sample of a compound (vitamin C) composed of only C, H, and O is burned completely with excess O2 . 0.2998 g of CO2 and 0.0819 g of H2O are produced. What is the empirical formula?
Sucrose, C12H22O11, is a nonelectrolyte; hypochlorous acid, HClO, is a weak electrolyte; and ammonium chloride, NH4Cl, is a strong electrolyte.
Although the actual process also requires water, a simplified equation for rusting (rust is shown as Fe2O3) is 4Fe(s) + 3O2(g) => 2Fe2O3(s) ?Hrxn = -1.65 x 103 kJ How much heat is evolved when 0.100 kg of iron rusts
A benzene-toulene solution with a mol fraction for benzene of 0.300 has a normal boiling point of 98.6 degrees Celsius. The vapor pressure of pure toulene at 98.6 degrees Celsius
What is the precipitate that forms when aqueous ammonium sulfide reacts with aqueous copper (II) nitrate
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