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Dinitrogen oxide (N2O), laughing gas, is used by dentists as an anesthetic. If a 20.0 L...

Dinitrogen oxide (N2O), laughing gas, is used by dentists as an anesthetic. If a 20.0 L tank of laughing gas has a pressure of 2.64×103 mmHg, how many moles of N2O in the tank?
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Answer #1

By using Ideal gas equation, weare going to answer this problem,
PV = nRT
where, P = 2.64*10^3 mmHg = 3.473684 atm
       V = 20.0 L
       R = 0.08206 L.atm/ mol.K
       T = 298.15 K
Moles of N2O, n = (PV/RT)
                = ((3.473684 * 20.0) / (0.08206 * 298.15))
                = 2.84 moles
Number of moles N2O = 2.84 moles

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