How many atoms of chromium are used in the coating
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?
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Which 1.0 M acid solution has the largest concentration of hydronium [h3O+]?
If the resultant force .·R is directed along a line measu red 75' clockwise from the positi"e x axis and the magnitude of F2 is to be a minimum. Determine the magnitudes of F R and •• ~ and the angk 0 s 90".
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?
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
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 ?
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
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