What is the pressure (in atm) in a 5.00 L tank with 9.00 grams of oxygen gas at 350 K?

1.61 atm

Explanation:

Using general gas law equation as follows:

PV = nRT

Where;

P = pressure (atm)

V = volume (L)

n = number of moles (mol)

R = gas law constant (0.0821 Latm/molK)

T = temperature (K)

From the information provided in this question,

V = 5.00L

T = 350K

mass of O2 = 9.00g

Using mole = mass/molar mass

Molar mass of O2 = 16(2) = 32g/mol

mole = 9/32

mole = 0.28mol

Using PV = nRT

P = nRT/V

P = 0.28 × 0.0821 × 350/5

P = 8.0458/5

P = 1.609

Pressure = 1.61 atm

i just learnt this recently but i need to look through my notes again