A student used 16.5 cm3 of nitric acid to neutralise 25 cm³ of 0.4 mol dm-3 sodium hydroxide solution. What is the concentration of nitric acid used? A）0.61mol dm-3
B）0.40mol dm-3
C）0.30mol dm-3
D）0.20mol dm-3

> 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.

they vary. it used to be meat, grain, bread, candy, beverages, donuts, and fruits/vegetables. now they added exercise in.