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The single atom of an isotope does not have a: a)relative atomic mass b) atomic number c)mass number d)average atomic mass
Use Slater's rules to calculate the shielding constant and effective nuclear charge for a 5s, 5p, and 4d electron in the tin atom. Which of these electron experience the lowest effective nuclear charge
Discuss the conditions under which DNA will be degraded to their constituent components by heating. Write the names of the degradation products that would be formed
Calculate the values of Avogadro's number and the Faraday assuming the charge in an electron is 1.602 x 10^-19 coulombs/electron. Also calculate the mass the magnesium anode have lost during the process.
What is the ratio of the number of molecules having twice the most probable speed to the number having the most probable speed
What is the electron-pushing mechanism for the aldol condensation reaction of benzaldehyde and acetone forming dibenzalacetone
How many gigagrams of niobium contain the same number of atoms as 12.5 nanograms of vanadium
the vapor pressure of nitrogen at several different temperatures is shown below.temperature k pressure torr65 130.570
To a small degree, some of the fuel supplied in the United States contains 5% ethanol, C2H5OH. If the density of this fuel is 0.737 g/mL, what is the molarity of the ethanol (fuel) solution
Suppose that the microwave radiation has a wavelength of 10.8 . How many photons are required to heat 205 of coffee from 25.0 to 62.0 ? Assume that the coffee has the same density, 0.997 , and specific heat capacity, 4.184 , as water over this tem..
A 500ml Buffer solutin is 0.150 M in HNO2 and 0.175 M in KNO2. The Ka for HNO2 is 4.6*10^-4. What is the inital pH of this buffer. What is the pH of the buffer in the question above if 0.0049 moles of HCl are added assuming no change in volume
Consider a gas mixture in a 1.50 dm3 flask at 22.0 C for each of the following mixtures, calculate the partial pressure of each gas, the total pressure and the composition of the mixture in mol percent
The Fischer esterification mechanism is examined in the following two questions in the assignment
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