Explain a balloon vendor at a street fair is using a tank

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A balloon vendor at a street fair is using a tank of helium to fill her balloons. The tank has a volume of 102 L and a pressure of 131 atm at 23 celsius . The pressure has dropped to 121 atm but the tank is still at 23 celsius, How many moles of gas has she lost?

Reference no: EM13169782

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