Please help I really need help on this I would really appreciate it anything helps !

In this chemical reaction, 325 grams of barium (ba) react completely. how many moles of lithium (li) are produced?

If i initially have a gas at a pressure of 12 atm, a volume of 23 liters, and a temperature of 200 k, and then i raise the pressure to 14 atm and increase the temperature to 300 k, what is the new volume of the gas?

In 2002, the rare earth elements mine in mountain pass, california was closed because