39. Given the following thermodynamic data, calculate the
lattice energy of CaBr2(s).
Express your answer to four significant figures, and include the
appropriate units.
57. The standard state of phosphorus
at 25∘Cis P4. This molecule has four
equivalent PP atoms, no double or triple bonds, and no
expanded octets. Draw its Lewis structure.
Draw the molecule by placing atoms on the grid and connecting
them with bonds. Include all nonbonding electrons.
39. Given the following thermodynamic data, calculate the lattice energy of CaBr2(s). Express your answer to four signif
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