If it takes three "breaths" to blow up a balloon to 1.2 l, and each breath supplies the balloon with 0.060 moles of exhaled air, how many moles of air are in a 3.0 l balloon? express your answer to two decimal places and include the appropriate units.

It takes 3 breaths to get to 1.2 l. One breath is then (1.2 l) / 3 breaths =.4l/breath. To get to 3.0 l we need the difference from 1.2 l. 3.0-1.2 = 1.8 l. Divide the difference by liters/breath (.4) to get how many needed breaths. (1.8 l) / (.4 l/breath) = 4.5 breaths to get the balloon to 3.0 l. In total there were 3 breaths + 4.5 breaths = 7.5breaths to get to 3.0 l. To find the total moles multiply 7.5breaths by. 060 moles/breath 7.5 breaths*.060moles/breath =.45moles