30.0 L of fluorine gas and 50.0 L of hydrogen gas, both at STP, are reacted to produce hydrogen fluoride gas. Which is the limiting reactant? Which is the excess? How many liters of hydrogen fluoride are formed in this reaction if the final pressure of HF is 1.25 atm and the final temperature is 25ºC?

the leaf is an organ of a typical plant, and the main functions are to complete photosynthesis and allow the plant to exchange gas, just like how we have the respiratory system. leaves have the stomata, which collects maintains co2 and o2 levels. this is necessary for cell metabolism. the leaf also collects sunlight using chloroplasts. succinctly, leaves own a pivotal role in sustaining plant life.

> 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.