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Offer a brief explanation of why bandgaps for octet p-block semiconductors (1) decrease with increasing average principal quantum number, and (2) increase with increasing electronegativity difference.
Given the reaction: 2Al + 3H2SO4 -> 3H2 + Al2(SO4)3 what would be the total number of moles of H2SO4 needed to react completely with 5.0 moles of Al ?
You have a 48.9 g sample of water at the temperature of -60.0 degrees celcius. How much energy is required to: a) heat the ice to 0 degrees celcius
A galvanic (voltaic) cell consists of an electrode composed of iron in a 1.0 M iron(II) ion solution and another electrode composed of copper in a 1.0 M copper(II) ion solution
you have 100 mL graduated cylinder containing 50 mL of water. you drop a 154 g piece of brass (d= 8.56 g/cm3) into the water. how high does the water rise in the graduated cylinder?
Draw the product of the reaction between 1-butyne and NaNH2 in NH3, then D3O+. To add a deuterium atom, first explicitly add an H.
During a photochemical smog episode in a coastal city, the steady-state concentration of oxygen radicals at ground level was measured to be 0.09 ppmv at 25 degrees celsius.
If a bottle of nail polish remover contains 181 g of acetone, how much heat would be released by its complete combustion? The density of acetone is 0.788 g/mL
Compute the final temperature of the solution (assuming no heat lost to the surroundings ) the solution has a specific heat capacity = 4.18 J/°C·
Explain the difference between accuracy and precision, as it pertains to experimental data. The best way to do so is to define
What is the wavelength (in nm) of the line in the spectrum of the hydrogen atom that arises from the transition of the electron from the orbital with n =3 to the orbital
how much energy is required to turn 500 g of ice at -15.0 celsius to liquid water at 55.0 celsius? specific heat (ice) = 2.10 J/g * C. Specific heat (water)= 4.18 J/g*C
Using electronegativity, predict in the order of decreasing polarity the following bonds: N-P, N-O, N-C, N-S, N-F. Predict how valence electrons would pair up in the AsO4-3 ion.
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