Fall 6-JORGENSEN I Activities and Due Dates I HW 9 12/12/2016 06:00 PM 44.5/100

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Fall 6-JORGENSEN I Activities and Due Dates I HW 9 12/12/2016 06:00 PM 44.5/100 12/11/201608:48 PM Gradebook Print calculator Periodic Table Question 11 of 32 Sapling Learning An open flask in a lab looks but know that actually it is with a of gases called air. the flask volume is 3.00 and the air is at standard temperature and pressure, how many gaseous molecules does the flask contain? molecules x 10 O Previous 8 Give up & view soluson Check Answer 0 Next Exit about us careers partners privacy policy terms of use contact us help a e

Explanation / Answer

An open flask sitting in a lab fridge looks empty, but we know that actually it is filled with a mixture of gases called air. If the flask volume is 3 .00 L, and the air is at standard temperature and pressure, how many gaseous molecules does the flask contain?

Ideal gas equation

PV=nRT

n = P V / R T

n = 3 liter x 1 atm / 0.082 l atm/mol deg / 273

n= 0.1340 moles

one mole = 6.023 x 10^23 molecules

# molecules = 6.023 x 10^23 x 0.1340 = 8.07082e+22 =0.807 x 10^23--------------answer

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