I deleted all my web browsers off my mac now i cant use internet !

Recently i deleted safari off my mac for some strange reason and its gone. Theres nothing wen i search in the finder or magnifying glass there nothing related in safari. So some how i downloaded l google chrome on my moms computer(hp) and transfer the download on my usb and put it on my computer. So yesterday there was a folder with like 2 things that said something about google chrome but i didnt think i needed it so i trashed it and now theres a question mark behind google chrome now and cant open. Someone please help me quick cuz of right now i have no internet and im a college student and need Internet ! Thank you guys

And im using my iphone btw to type this answer