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(a) The mass spectrometer in Figure 2.12 has a magnet as one of its components What is the purpose of the magnet?
(b) The atomic weight of Cl is 35.5 amu. However, the mass spectrum of Cl (Figure 2.13) does not show a peak at this mass. Explain.
(c) A mass spectrum of phosphorus (P) atoms shows only asingle peak at a mass of 31.What can you conclude from this observation?
What is the entropy change for the reaction 2H2(g) + O2(g) 2H2O(l) at 372.2 K and 1.0atm? the enthalpy of reaction at 298.2K and 1.0atm is -572 KJ. The Cp values for H2, O2 and H2O are respectively
50.50 mL of 0.116 M HF is titrated with 0.1200 M NaOH. How many mL of the base are required to reach the equivalence point? (Ka for HF is 6.8 x 10-4)
how many mL of 1.00 M hydrochloric acid is needed to prepare a 100.0 mL solution of hydrochloric acid with pH = 5.0 that also contains 0.01667 M MgCl2?
What is the change in the boiling point of a solution made by dissolving 14.7 g of C6H12O6 into of water. the density of water is and.
A specific brand of gourmet chocolate candy contains 7.00 g of dietary fat in each 22.7 g piece. How many kilograms of dietary fat are in a box containing 4.00 lb of candy?
the heat of vaporization of a liquid deltahvap is theenergy required to vaporize 1g of the liquid at its boilingpoint.
consider a cup of coffee that has a temperature of 93oc. assume the mass of the coffee is 550 g and that the specific
Given the subsequent data for the length of a side of the unit cell for compounds that crystallize in the rock salt structure, find out the cation radii: MgSe (545pm), CaSe (591 pm), SrSe(623pm), BaSe (662 pm). It is known that the Se2-ions are in..
Draw the mechanism for the formation of the thermodynamic and kinetic products of the reaction - The first retrosynthetic disconnection should give you two molecules with equal number of carbon atoms in the"skeleton".
Find the pH and the concentration of each of the species of lysine in a solution of .010M lysine monohydrochloride (lysine-HCl)
Suppose 1-chlorobutane were halogenated with bromine atoms instead of chlorine atoms. What effect would that have on the relative yields of the four bromochlorobutanes compared to the dichlorobutanes you determined
Use the bond dissociation energies in Table 7.1 on page 219 (of your text) to calculate an approximate ?H° in kilojoules for the reaction of ethylene
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