no
CO2
air is a mixture of elements.so is water. Air-it has hydrogen,oxygen,nitrogen,carbon di oxide,water vapour etc but in different proportions so it is a mixture of elements.
we breathe in air as a whole which contains both carbon Di-oxide and oxygen but we exhale out carbon Di-oxide and other usefulness gases
water does not have carbon di oxide in it
CO2
Carbon di-oxide
carbon and 2 oxygen hence carbon "di"oxide
Carbon di oxide CO2
carbon di oxide
carbon di oxide & helium
Formula: CO2
Carbon di-oxide