How many valence electrons are found in gallium? 3 5 7 8

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)

Y=‐1x + 7 if y has a value of ‐24 what is the value of x?

When a spring is compressed, the energy changes from kinetic to potential. which best describes what is causing this change?