1 Surface chemistry can also be interpreted from a coordination chemistry approach, and processes such as ion exchange, sorption, and weathering are really ligand exchange reactions.  Coordination compounds are complexes that consist of one or more central atoms or ions with one or more attached molecules.
With more than 18,000 Starbucks locations worldwide, the coffee giant has several unusual stores that are worth a look. Author Created with Sketch. With more than 18,000 Starbucks locations worldwide, the coffee giant has several unusual stores that are worth a look.
Subway owns and operates no stores. Their business model is franchising. The biggest chain I can think of is Starbucks, which has approximately 6,700 US-based locations. These are company-owned and -operated stores, which is not to be confused with their 4,400 licensee-operated stores.