Isotopes
The answer has to be 20 characters long so this is irrelevant.
s would be secondary Explanation:
just cause
A person that studies rocks minerals and earth's land forms are geologist
Pure water is very close to a pH of 7. The Great Salt Lake (from what I've read about) can range from 8.2 to 7.7 in different areas. Saliva is between 6.5 and 7.5. And ammonia has a pH of 11.
So the items that have a pH between 5 and 8 are pure water, saliva, and possibly the Great Salt Lake.
