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Neon has three naturally occurring isotopes: 20Ne (19.992amu) with 90.48% abundance, 22 Ne(21.991amu) with 9.25% abundance, and a third isotope with 0.27% abundance. Calculate the mass of the third isotope of neon in (a) amus and (b) in relation to the mass of an atom of 12C (i.e. the mass of the neon isotope = (some factor)*(the mass of an atom of 12C)).
It takes 48.0J to raise the temperature of an 9.60g piece of unknown metal from 13.0c to 24.0. What is the specific heat for the metal? Express your answer numerically, in J/g.C
What are the names and principle differences in the two models of substrate/enzyme complex formation?
How would you synthesize 3-isopropyl sulfide cyclopentanol. - using less than a 6 carbon molecule.
Hydrogen atoms are excited by a laser to the n=4 state and then allowed to emit. What is the maximum number of distinct emission spectral lines that can be observed from this system? Calculate the wavelength of the 4 to 1 transition in m.
the standard free energy change delta G*T at 500K is equal to 9.8*10^4 J/mol. Calculte the equilibrium constant at 500 K.
How many grams and pounds of washing soda are needed to remove the hardness from 500 gallons of water that has a hardness of 150 ppm CaCO3?
a solution of ethanol c2h5oh in water is prepared by dissolving 65.7 ml of ethanol density 0.79 gcm3 in enough water
Nickel metal in 0.1M nickel nitrate solution Copper metal in 0.1M copper nitrate solution The solutions are joined by a simple salt bridge. The nickel corrodes and the copper plates on during operation of the cell. Answer the following question: W..
A Mixture of 80mL of Hydrogen Gas and 60 mL of Oxygen gas is ignited by a spark to form water (please show work) a) does any gas remain unreacted.
72.0 mL of a 1.40 M solution is diluted to a volume of 278 mL. A 139-mL portion of that solution is diluted using 161 mL of water. What is the final concentration.
At 25 degrees celsius how many dissociated H+ ions are in 167 mL of an aqueous sloution whose ph=12.07? hint find concentration of H+
The excess reagent required 4.30mL back-titration with .00812M Cu2+. Calculate the average weight of Cr on each square centimeter of surface.
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