An unknown compound consists of 9 moles of hydrogen, 3
moles of carbon, and 3 moles of bromine. The empirical
formula of the compound should be:
a C3H, Br3
b CH2Br
C CH₂Br
d CH2Brg

samuel de champlain. in 1608, king henry iv sponsored pierre dugua, sieur de mons and samuel de champlain as founders of the city of quebec with 28 men. this was the second permanent french settlement in the colony of canada.

a 20-cm-long, cylindrical graphite (pure carbon) rod is inserted into an oxidizing atmosphere at 1145 k and 1.013 x 105 pa pressure. the oxidizing process is limited by the diffu- sion of oxygen counterflow to the carbon monoxide that is formed on the cylindrical surface.