Q1. If a piece of ice absorbs 131 J of heat energy, how much was lost by the surroundings? Q2. Suppose you take 208 grams of water at 24 oC and put it into the freezer to make ice where is reaches -3 oC. Calculate the energy change. ( csolid =2.10 J/goC, cliquid = 4.18 J/goC, Hfusion = 333J/g)

53

Explanation:

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.