Which of the following will be a precipitate (a solid) in a double displacement reaction?
Select one:
a. (NH4)2S
b. PbCl2
c. Na, C03
d. K2SO4

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.

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