HQ10.35 Dry ice is sometimes used for special effects to form a \"fog\" asit sub

Question

HQ10.35 Dry ice is sometimes used for special effects to form a "fog" asit sublimes from the solid to the gaseous state. If 9.0 grams of dry iceis used to generate this "fog", how many torr of pressure will be exerted by the gaseous carbon dioxide once all of the dry ice sublimes? Assume the volume of the auditorium where the fog is generated is 1.24x105 m3and the temperature is 22°C. (Enter your answer using either standard or scientific notation. For scientific notation, 6.02 x 1023 is written as 6.02523.) Numeric Answer Your Answer 3.34E-7 I attempt left Change your responses to resubmit Answered Hide Open in fullscreen MacBook Ai

Explanation / Answer

Given

Mass = 99 g

Molar mass of CO2 = 44 g/mol

No. of moles = Mass / molar mass = 99 g / 44 g/mol = 2.25 moles

Volume = 1.24 * 105 m3 = 124 L

Temperature = 22 C = 295 K

R = 8.314 J/mol.K = 0.08206 L.atm/mol.K

PV = nRT

P * 1.24 * 105 m3 = 2.25 moles * 8.314 J/mol.K * 295 K

P * 124 L = 2.25 moles * 0.08206 L.atm/mol.K * 295 K

P = 0.439 atm = 0.439 * 760 torr = 333.83 torr Answer

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