If you filled a balloon with helium so that it has a volume of 5.6L at standard temperature and pressure (STP), there would be(blank) moles of helium in the balloon.

0.50 hope this  

3-isopentane; 3-methylbutane, and 1,2-methylpropane do not meet iupac rules, so they are wrong names.the only valid name onthe list is 2-methylbutane, which is the same isopentane.this is its formula:                   ch2                    |ch3 - ch - ch2 - ch3answer: 2-methylbutane

The correct answer is:   [a]:   "polar easterlies move cool air to the mid-latitudes."