How would u figure the number of neutrons in an atom?

Calculate the change in entropy if br2(l) is converted to br2(g). 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)

How many atoms are there in 5.70 mol of mg

Stage in which a typical star has completely stopped fusion