Which apparent motion can be explained by a geocentric model ?

clouds form

solid ice forms on leaves.

water droplets form on grass.

6.4 cm (max) - 25 cm (min)

"record the time to complete a chemical reaction" would most likely be part of a lab procedure.

> 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.