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Sunny_sXe [5.5K]
3 years ago
14

An open flask sitting in a lab refrigerator looks empty, but it is actually filled with a mixture of gases called air. If the fl

ask volume is 2.00 L, and the air is at standard temperature and pressure, how many gaseous molecules does the flask contain?
Chemistry
1 answer:
erastova [34]3 years ago
7 0

Answer: 67.4\times 10^{23} molecules are there in the flask

Explanation:

According to the ideal gas equation:

PV=nRT

P = Pressure of the gas = 1 atm    

V= Volume of the gas = 2.00 L

T= Temperature of the gas = 273 K    0^00C=273K

R= Gas constant = 0.0821 atmL/K mol

n= moles of gas

n=\frac{RT}{PV}=\frac{0.0821\times 273}{1\times 2.00}=11.2

According to avogadro's law, 1 mole of every substance occupies 22.4 L at STP and contains avogadro's number 6.023\times 10^{23} of particles.

1 mole of gaseous air contains =  6.023\times 10^{23} molecules

11.2 moles of gaseous air contains =  \frac{6.023\times 10^{23}}{1}\times 11.2=67.4\times 10^{23} molecules

67.4\times 10^{23} gaseous molecules are contained in the flask.

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