C3H2 + 502 + 3 CO2 + 4H20
5) How many moles of oxygen (O2) are needed to react to produce 4.8 moles of carbon dioxide
(CO2)?
6) Determine the number of moles of water produced from 1.55 moles of propane (CH3).

May someone me with these science questions

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.

The sum of the oxidation numbers in a neutral compound is always