Write the mechanism (propagation steps only!) for the reaction of propane with bromine to give 2- bromopropane.

Calculate the change in entropy if br2(l) is converted into gaseous br atoms. s° for br2(l) = 152.2 j/(mol•k) s° for br2(g) = 245.5 j/(mol•k) s° for br(g) = 175.0 j/(mol•k)

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Which characteristics can be used to differentiate star systems? check all that apply.