A 250 gram chunk of silver is dropped into 250. mL of water at 23.0 °C. The final temperature of the water was measured as 30.1 °C. Calculate the initial temperature of the
piece of silver. Assume that all heat transfer occurs between the silver and the water (the Cp
of silver is .240 J/gºC and water is 4.18 J/gºC)

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Explanation:

the correct answer is a

the number of valence electrons for each molecule or ion is shown beneath the structure. remember hydrogen will not have more than two electrons. this hydrogen is part of a covalent bond (sharing two electrons). a double bond here would cause hydrogen to share four electrons with phosphorus.