oxygen
Nitrogen is a gas and is its own element. Nitrogen makes up 71% of the air we breath. 28% is oxygen and 1% is carbon dioxide and other gasses.
we breath in oxygen and breath out carbon dioxide.
Water! Water is a substance, not an element, but the elements that make up water are Hydrogen and Oxygen, so those elements are both essential to life. Every living thing requires water to survive. Oxygen also useful because all animals need to breath oxygen.
Since only the NH3 (ammonia) contains more than one element - in this case nitrogen (N) and hydrogen (H) that would be the compound. Ozone (O3), nitrogen (N2) and hydrogen (H2) gases are each composed of a single element (although most people are more familiar with the O2 form of oxygen since it is the one we like to breath to stay alive rather than the 03 form that hurts like crazy if you breath in much of it but protects us from UV rays by absorbing them in the upper atmosphere).
oxygen
Oxygen
that would be oxygen
Carbon Dioxide
Carbon Dioxide
No. This is impossible because we breath it in.
oxygen is the most used element in the periodic table because we use it to breath and to make carbon dioxide (CO2) when we breath out.
yes because air is used to make out ok oxygen which is an element for us to breath in.
I would guess it would be a compound because your breath is basically water vapor and water is a compound (H2O)
Oxygen is itself a chemical element.
oxygen because without it you could not breath. >o<
if you want to breath obviously you need oxygen and hydrogen