1. Determine whether each of the isotopes below is stable or unstable by first determining the
N/Z ratio N/Z Stable/Unstable
a. 3 H

b. 14N

c. 14O

d. 97Kr

e. 206Pb

How much would the freezing point of water decrease if 4 mol of nacl were added to 1 kg of water (kf=1.86 degrees c/(mol/kg) for water and i=2 for nacl a- 7.44 degrees c b- 14.88 c 3.72 d 1.86