If it takes three "breaths" to blow up a balloon to 1.2 LL, and each breath supplies the balloon with 0.060 moles of exhaled air, how many moles of air are in a 3.0 LL balloon?

0.45 moles of air are in a 3.0 L balloon

Explanation:

The given problem can be solved by using unitary method.

Firstly, we have to find out how many breaths are equivalent to 3.0 L. Secondly, we have to find out how many moles of air are supplied corresponding to the calculated number of breaths.

1.2 L = 3 breaths

So, 3.0 L = breaths = 7.5 breaths

1 breath supplies 0.060 moles of air

So, 7.5 breaths supplies moles of air or 0.45 moles of air.

Hence, 0.45 moles of air are in a 3.0 L balloon.

passing a magnet thought the

mixture , because iron gets attracted to magnet .