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a mylar balloon is inflated with helium at T=293k to a pressure of 1.15 atm. If the volume of the balloon is 0.750 L, how many atoms of helium are in the balloon?
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a mylar balloon is inflated with helium at T=293k to a pressure of 1.15 atm. If the volume of the balloon is 0.750 L, how many atoms of helium are in the balloon?

User Moxn
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PV=nRT \\ 1.15 * 0.75 = n * 0.082 * 293 \\ 0,8625 \: = 24,026x \\ x = 0.036 \: mol \\ n = (m)/(MM) \\ 0.036 = (m)/(4) \\ m = 0.036 * 4 \\ m = 0.144 \: g
User Holodnyalex
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