if 0.25 mol of argon gas occupies a volume of 76.2ml at a particular temperature and pressure, what volume would 0.43 mol of argon have under the same conditions?

If Neon gas at a particular temperature and pressure occupies a volume of , what volume would  Neon gas occupy under the same conditions?

If 2.77 g of argon gas occupies a volume of 4.27 L, what volumewill 1.20 mol of argon occupy under the same conditions?

I don't know how to do this at all apparently. I keep coming upwith 26.8 or 26.88 or rounded to 26.9 but it's all wrong.HELP!

A 32.8 g sample ofhydrogen gas occupies a volume of 21.6L at aparticular

temperature andpressure. What volume does 12.3 g ofhydrogen gas occupyat

the same pressure andtemperature?