Can someone help me with the calculations? I also need to find: l) Room pressure

Question

Can someone help me with the calculations?
I also need to find:
l) Room pressure in atmospheres
m) Volume of the flask in liters
n) Temperature of the lab gas in Kelvins
o) Number of moles of lab gas from the ideal gas law
p) Molar mass of the lab gas

also, What would the density of lab gas at STP (0°C and 1 atm)?
lets say 18g/mol * 1mol/22.4L

DATA a) Mass of the lask, stoppet, and air b) Tempersture in the room. d Mas of the flask, stopper, and lab gas d) Temperature in the hood. )Volume of the laak measured by the cylinder 0 Room preeurs in maHe 3 su o Density of dry air frem the chart CALCULATIONS b) Mess of the air in the flask à Mass uf the flask and stopper without air D Mass of the lab gas sample k) Denkity of the lab gas in grams per liter

Explanation / Answer

Room pressure in mmHg = 760 mmHg = 760 mmHg * 1 atm/760 mmHg = 1 atm

Volume of the flask in liters = 260 mL * 1 L/1000 mL = 0.260 L

Temperature of the lab gas = 23.70C = (23.7 + 273.15 ) K = 296.85 K'

Number of moles of lab gas from the ideal gas law :

PV = nRT

1 atm (0.260 L) = n (0.0821 L.atm/mol.K) (296.85 K)

n = 0.010668 mol gas

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