CO2 is a pure substance made of two elements, Carbon and Oxygen. Calculate the composition of the mixture. Carbon dioxide is a compound; in water solution is called frequently carbonic acid but is not correct.The system CO2-H2O is a mixture. Yes, carbon dioxide is a pure substance not a mixture. Air is a mixture of many elements and compounds. Is carbon dioxide a mixture or a pure substance why? The percentage composition of CO2 in the mixture is: It gets confusing because the air is made almost entirely of compounds but since there are multiple compounds combined physically and not chemically to each other, it is classified as a mixture. It isn't an organic compound as to be considered organic a compound must have carbon bonded to hydrogen. It is a mixture of 1 carbon atom and 2 oxygen atoms. it is a mixture because H2O is a compound and chlorine is an element, element + compound = mixture, so if pool water is H2O + Cl, then it is a mixture CO2 it is a compound between they are two different elements which can form bonds with each other. A mixture of CO and CO2 is found to have density of 1.50 g L-1 at 200C & 740 mm pressure. Click hereto get an answer to your question ️ A mixture of CO and CO2 is found to have a density of 1.5 gm/L at 30oC and 740 mm pressure. First consider the properties of a pure substance: •made of only one type of atom or molecule •has a well-defined melting point, boiling point, colour, odour, density and solubility. Carbon dioxide (CO2) is a chemical compound. A mixture is two elements which cannot react with one another, a good example would be any noble gas mixed with any other elements, because …