How many moles of hydrogen gas are present in a 50 liter steel cylinder if the pressure is 10 atm and the temperature is 27 degrees Celsius?

12.2 moles of H₂

Explanation:

P . V = n . R . T is the Ideal Gases Law, which is useful to solve this:

First of all, we need to convert the T°C to T° K

T° K = T°C + 273 → 27°C + 273 = 300 K

Let's replace the data given: 10 atm . 50L = m . 0.082L.atm/m.K . 300K

500 L.atm / 0.082L.atm/m.K . 300K = m

12.2 moles = n

it is the most commonly accepted one