It is pronounced "ka-oh" and is used in the same way as in English.
Here are some examples of how "chaos" is used in French:
* "Le chaos régnait dans la ville après le tremblement de terre." (Chaos reigned in the city after the earthquake.)
* "Il y avait un chaos total dans la cuisine." (There was total chaos in the kitchen.)
* "Le chaos est une force puissante dans l'univers." (Chaos is a powerful force in the universe.)
There are other, less common translations for "chaos" in French, such as:
* "Désordre" (disorder)
* "Tumulte" (tumult)
* "Brouhaha" (uproar)
However, "chaos" is the most direct and commonly used translation.