How many moles are in 3.22g of Ni(CO)4?

What is the number of moles of chemical units represented by 9.03x10^24? and how do i show work? (dumb it down )

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?

Measurements that have similar values are: a. usually accurate b. sometimes accurate c. always accurate d. never accurate