I need the answers with the process for numbers 1-4. Thanks in advance.

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)

Sugar is dissolved in water. which is the solute? sugar neither both water

The number at the end of an isotope’s name is the number.