Write an example of double displacement reaction

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Astudent reacts 13 moles of iron with 21 moles of oxygen according to the following equation:

Areader can tell that the meaning of “obnoxious” will include “having the quality of something” because of the .a) prefix b)pronunciation c)suffix d) word root

If a solution contains 3 moles/liter of sodium chloride (nacl, made of sodium ions and chloride ions), what is the osmolarity of this solution