Helium gas in an ideal otto cycle
Helium gas in an ideal Otto cycle is compressed from 12°C and 2 L to 0.25 L, and its temperature increases by an additional 800°C during the heat addition process. The temperature of helium before the expansion process is ?
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A solution is prepared by dissolving 15.0g of nh3 in 250g of water. The density of resulting solution is 0.974g/ml. Calculate the molarity of nh3 in the solution described above
A sample of chlorine, which has an average atomic mass of 35.86, consists of two isotopes with mass of 35 and 37. What is the percent (to 0.1%) abundance of the 37 isotope?
An auto bumper is coated with a layer of chromium, 0.017 cm thick. The bumper has a surface area of 3.43 x 104 cm2. The density of chromium metal is 7.19 g/cm3. How many atoms of chromium are used in the coating?
In a binary communication system, a binary 0 is transmitted using an electrical pulse of magnitude +2.5V and a binary 1 is transmitted as a pulse of magnitude 0V. the additive noise in the channel is known to be Gaussian with a mean of zero an
What two steps in the reaction are accelerated by the presence of strong acid, and what function does the acid play in each of these steps?
The 1H NMR spectrum of compound A has one singlet integrating to 1 H, two doublets integrating to 3 H and 6 H, and two multiplets each integrating to 1 H. The 1H NMR spectrum of compound B has a singlet integrating to 6 H, a triplet integrating to
What is the final volume of a 400 mL gas sample that is subjected to a tempature change from 22 degrees celcius to 30 degrees celcius and a pressure change from 760 mm Hg to 360 mm Hg?
How many grams of F2 are needed to produce 120. g of PF3 if the reaction has a 78.1% yield?
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