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The common Eastern mole, a mammal, typically has a mass of 69 g, which corresponds to about 6.9 moles of atoms. (A mole of atoms is 6.02 x 1023 atoms. In atomic mass units (u), what is the average mass of atoms in the common Eastern mole?
The first ionization energy of Bismuth is E_i1 = +703 kJ/mol. What is the longest possible wavelength of light that could ionize an atom of bismuth
CH3COOH (Ka=1.8x10^-5) was titrated with 0.50 M NaOH. Calculate the pH after addition of 30.0mL of NaOH
how many grams of C6H12O6 must be added to 250g of water to lower the vapor pressure by 1.30mm Hg at 40C degrees? the vapor pressure of water at 40C degrees is 55.3mm Hg.
what is the theoretical yield of aluminum oxide if 1.60 mol of aluminum metal is exposed to 1.50 mol of
How much heat is absorbed in the complete reaction of 3.00 grams of SiO2 with excess carbon in the reaction below? Change in H degrees for the reaction is +624.6 kJ. SiO2 (g) + 3C (s) -> SiC (s) + 2CO (g)
What is the approximate pH of a solution of the salt NH4(O2CCH3) (ammonium acetate)? No calculations -- only reasoning needed. pKa/pKb values in your notes
Describe the preparation of 12 mL of a 0.050 M solution of each of the halogens, using the reactions in the preceding question. Available to you are solid Ca(OCl)2
How do you determine number of rings, double bonds, or triple bonds from degrees of unsaturation. For example a substance C8H8 has 5° degrees of unsaturation, so determine the number of rings and double bonds
Propose a mechanism for the acid-catalyzed syntheis of 4,5-dimethyl-dioxxolane from formaldehyde and 2,3-butanediol
Commercial electrolytic cells for producing aluminum operate at 5 volts and 100,000 Amperes. How long does it take to produce 1000 kilograms of aluminum
The end products of the oxidation are carbon dioxide (CO2), ammonia (NH3), and water. Assume that nitrogen not incorporated in cell-tissue production will be converted to ammonia.
At what point is the temperature in degrees farenheit exactly twice in degrees celsius
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