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Boron triffuoride gas is collected at 21.0C in an evacuated flask with a measured volume of 10.0. When all the gas has been collected, the

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Boron triffuoride gas is collected at 21.0C in an evacuated flask with a measured volume of 10.0. When all the gas has been collected, the pressure in the flask is measured to be 0.180atm. Calculate the mass and number of moles of boron trifluoride gas that were collected. Aound your answer to 3 significant digits

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