Can I export the received submissions to Excel?

Yes you can, you have plenty of options to choose from but this would be the easiest way: How-to-Export-Form-Data-to-Excel 

You may also refer to these guides on how to export your submissions:

https://www.jotform.com/help/269-How-to-View-and-Export-Form-Submissions

https://www.jotform.com/help/73-How-to-Download-Form-Submissions-as-Excel-CSV-PDF 

Hope this helps! Let us know if you'll need further assistance.