Compare the properties of substances (i.e. establish the similarities and differences between them): a) Carbon dioxide and oxygen;

| July 6, 2021 | education

Compare the properties of substances (i.e. establish the similarities and differences between them): a) Carbon dioxide and oxygen; b) Nitrogen and carbon dioxide; c) Sugar and salt; d) Acetic and citric acid.

CO2 and O2 have different molecular structures. Oxygen is made up of two oxygen molecules, while carbon dioxide is made up of two oxygen molecules bonded to a central carbon molecule.

CO2 has a slightly higher mass than O2. The molecular weight of CO2 is 44 g / mol and the molecular weight of oxygen is 32 g / mol. Although CO2 is heavier than O2, gases do not separate into layers in the atmosphere. Convection and diffusion support mixing of various atmospheric gases.

Oxygen freezes at -218 degrees Celsius and boils at -183 degrees Celsius. Carbon dioxide freezes at -78.5 degrees Celsius and boils at -57 degrees Celsius.



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