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.

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Describe what happens to the molecules as water goes from ice to liquid to vapor. be sure to explain what happens to the temperature during the phase changes.

Count the number of each type of atom in the equation below, and then balance the equation. write in the numbers of atoms and coefficients. add a 1 if there should be no coefficient. cs2(l) + o2(g) → co2(g) + so2(g) c [ ] s [ ] o > c [ ] s [ ] o [ ] cs2(l) + [ ] o2(g) > [ ] co2(g) + [ ] so2(g)