How many moles is 1 x 10^9 molecucles of o2

answer by yourhope:

how do models compare to real-world objects?

d. most models represent a real-world object in a simpler way.

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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.