1. Silicon dioxide (quartz) is usually quite unreactive but reacts readily with hydrogen fluoride according to the following equation: SiO2(s) + 4HF(g) → SiF4(g) + 2H2O(l)

If 6.0 mol HF is added to SiO2, how much (g) SiF4 is produced?

> 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.