The average atomic mass of lithium is 6.94 amu. Based on the atomic masses of the two isotopes of lithium, how do the relative abundances of the
isotopes compare?
Isotope
Atomic mass (amu)
Li-6
6.015
Li-7
7.016
A. Li-7 is slightly more abundant than Li-6.
B. They are about the same.
C. Li-6 is much more abundant than Li-7.
D. LI-7 is much more abundant than Li-6

Consider the following reaction at equilibrium: c(s)+h2o(g)⇌co(g)+h2(g) predict whether the reaction will shift left, shift right, or remain unchanged upon each of the following disturbances. a) c is added to the reaction mixture. b) h2ois condensed and removed from the reaction mixture c) co is added to the reaction mixture d) h2 is removed from the reaction mixture.