Since space is a vacuum. And humans breathe out oxygen which will transform into carbon dioxide, would it transform(not really transform, you all know what my reference is)(what does it really do when it leaves our body?)into carbon dioxide and after it is sucked into spaces' vacuum, where does it go? if it stays at it's original form of oxygen, still where does it go. And why would it morph to carbon dioxide if it does? and how could the sun(since a gas substance) exist since it's a mix of Gases?