Chemistry Gases and Gas laws?

Here you are using the equation PV = nRT Doing: (100 L)(12 atm) = n(0.0821)(298 K) n = 48.9 mols of He. And: (1 L)(1.2 ATM) = n(0.0821)(263 K) n = 0.0556 mols So, 48.9 / 0.0556 = 8.75 balloons.

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