There's evidence to suggest the Earth formed with plenty of water already: https://news.nationalgeographic.com/news/2014/10/141030-starstruck-earth-water-origin-vesta-science/
There's evidence to suggest the Earth formed with plenty of water already: https://news.nationalgeographic.com/news/2014/10/141030-starstruck-earth-water-origin-vesta-science/
Yes you are right. There is the hypothesis of the biochemical reaction of the Earth's surface. There are assumptions that instead of emitting water, it was absorbed by it's surface.