A radioactive isotope of copper decays as follows: 64 64 0
Cu → Zn + -1β
t 1/2= 12.8 hours
Starting with 84.0 g of 64∧Cu, calculate the quantity of 64∧Zn produced after 25.6 h.

This is a mixture that has the same composition throughout.

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)

Select each correct answer. more than one answer may be correct. which of the following is a characteristic of unicellular organisms? they can possess tissues and organs. all of their functions are performed by a single cell. they are usually microscopic. each of their cells is specialized to perform a specific function.