An oxygen gas container has a volume of 20.0 l. how many grams of oxygen are in the container if the gas has a pressure of 883 mmhg at 24 ∘c? express your answer to three significant figures and include the appropriate units.

Answer : The mass of oxygen gas will be, 30.5 grams

Solution :

Using ideal gas equation,

where,

n = number of moles of gas

w = mass of gas  = ?

P = pressure of the gas =

conversion used : (1 atm = 760 mmHg)

T = temperature of the gas =

M = molar mass of oxygen gas = 32 g/mole

R = gas constant = 0.0821 Latm/moleK

V = volume of gas = 20.0 L

Now put all the given values in the above equation, we get the mass of oxygen gas.

Therefore, the mass of oxygen gas will be, 30.5 grams

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