4HCl(g) + O2(g) ---> 2H2O(g) + 2Cl2(g)
a. If the rate that hydrogen chloride is being lost is 0.10 M/s, what is the rate that molecular oxygen is being lost?
b. If the rate that water vapor is being formed is 0.35 M/s, what is the rate that hydrogen chloride is being lost?