The distance from the earth to the sun is how many light years
a) exactly one light year
b) any number of light years
c) less than one light year
d) more than one light year

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> b takes place in the gas phase in an isothermal tubular reactor. the feed is one mole of a per one mole of c, an inert. the entering temperature and pressure are 427°c and 10 atm, respectively. the gas constant r = 0.08206 atm · l/mol · k.