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The machine can operate between a heat reservoir at 540K and 300K as well as the machine can convert heat of 1000J into work of 450J. Explain what is the entropy change of the machine?
The oxidation number of Cr changes during the reaction from ____ to ___. Because of this change, chromium is reduced/oxidized (circle one). The oxidation number of the alcoholic carbon changes from ___ to ___. Because of this change, the carbon is..
Ammonia is produced by the reaction of hydrogen and nitrogen N2(g)+3H2(g)--->2NH3(g). a) How many moles of H2 are needed to react with 1.0 mol of N2? b) How many moles of N2 reacted if 0.60 mol of NH3 is produced?
A layer of chromium is electroplated on an automobile bumper by passing a constant current of 200.0A through a cell that contains Cr3+(aq). Calculate the number of minutes needed to deposit 125g of chromium.
Which element in each of the subsequent sets would you expect to have the lowest third ionization energy, IE3
question which of the following reagents might serve as the basis for a simple chemical test that would distinguish
the activation energy for the reaction involved in the souring of raw milk is 75kj. milk will sour in about 8 hours at 21 degrees c. how long will raw milk last in refrigeratior maintained at 5 degrees c? assume rate constant to be inversely propo..
In the photosythesis process sugars are produced during the reaction of carbon with water Assuming air is composed of 0.030% carbon dioxide calculate the volume of air required at reference conditions to produce 1.0kg of sugar.
A protein biochemist attempted to determine the amino acid sequence of a decapeptide. Use the results fromt he trypsinm chymotrypsin, and cyanogen bromide treatments to suggest the amino acid sequence.
how many grams of ice at -20.5 degrees c can be completely converted to liquid at 16.3 degrees c if the available heat
you need to titrate 38.2 ml of an acetic acid solution ch3cooh. acetic acid is a monoprotic acid. you begin your
To determine the concentration of a 25.0 ml acetic acid solution (Ka for acetic acid is 1.8 X 10^-5), 25.0 ml of 2.00 M NaOH solution is used to reach the endpoint of titration. Calculate the pH of the endpoint.
Determine the center temperature of the product afer 60 minutes if the convective heat transfer coefficient between the product and mbient air is 25 W/m^2 K.
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