At the carnival a baby was given a helium balloon whose pressure equaled the atmospheric pressure at the carnival which was 102.7 kPa however, the baby wasn't paying attention and the balloon floated away into the troposphere where the atmospheric pressure is 97.8 kPa. What is the positive difference between the pressure in the balloon and the pressure of the troposphere in atm?

Astable electron arrangement for an atom is one that does not easily change. how is this arrangement arrived at? a. valence electrons are transferred or shared to create a full outer shell of electrons. b. valence electrons are discarded into space to create a full outer shell of electrons. c. protons (positive charge) pair with valence electrons (negative charge) to create a strong bond. d. outer shells with valence electrons are transferred or shared.