Please help im stuck

A__ is two or more substances that are together in the same place but are not chemically combined

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)

What is the value of keq for the reaction expressed in scientific notation