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Calculate the final temperature when a 20.4 gram sample of ice at 0oC is placed into a styrofoam cup containing 111 grams of water at 72.7 oC. Assume that there is no loss or gain of heat from the surroundings. Calculate the entropy change that occurs during this process.
If the surface area of a human body is 16,100 square centimeters, what is the total weight of the atmosphere on a human body
What would happen if you accidentally used 6M HCl aqueous solution instead of saturated Na2CO3 aqueous solution when extracting caffeine from tea bags.
positrons cannot penetrate matter more than a few atomic diameters but positron emission of radiotracers can be
Obtain from a reference work the solubility of silver acetate at 20 degree C. Usually this will be reported in units of grams per 100 mL of water
What is the volume of .885 M hydrochloric acid required to react with (a) 25 mL of .288 M aqueous ammonia (b) 10 g of sodium hydroxide (c) 25 mL of a solution
You have a certified "5 ppm Fe standard" that you obtained from NIST. By your method you measured it to be 4.8 ppm. Discuss your measurement precision
Determine the number of signals expected in the carbon 13 spectra for each of the following compounds. propyl benzene and 1,2,4 trimethyl benzene
Deuterium is a heavy isotope of hydrogen. How would it make a product of isoborneol different if it is used
Given the values of ?Gfo given below in kJ/mol, calculate the value of ?Go in kJ for the reaction at 298 K.: 3 NO2(g) + H2O(l) => 2 HNO3(l) + NO(g) ?Gfo (NO2) = 51.0 ?Gfo (H2O(l)) = -235.3 ?Gfo (HNO3) = -81.7 DGfo (NO) = 86.8
The formation of organic compounds by the reaction of Iron(II) sulfide and carbonic acid is described by the following chemical equation: 2 FeS + H2CO3 --> 2 FeO + 1/n (CHOH)n + 2 S
a calculator to calculate the average and standard deviation for x1 through x12. i know how to find the average but i dont understand how to findthe standard deviation.
A sample of pure NO2 is heated to 388C at which temperature it partially dissociates according to the equation.
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