Boron trifluoride gas is collected at \( -7.0^{\circ} \mathrm{C} \) in an evacuated flask with a measured volume of 5.0 L . When all the gas has been collected, the pressure in the flask is measured to be 0.320 atm .
Calculate the mass and number of moles of boron trifluoride gas that were collected. Round your answer to 2 significant digits.
mass: \( \square \) g \( \square \) \( \sqrt{10} \)
mole: \( \square \) mol