Which of the following is NOT believed by scientists to have been present in the early earths atmosphere? a. Ammonia
b. Free oxygen
c. Methane gas
d. Water vapor

Are these strong bases, neutral, strong acids, weak acids or weak base household bleach (ph=12.6) fluid in a car's battery (ph of less than 1.0) milk (ph=6.7) stomach contents (ph=2.2) pure water (ph=7)

How does human environment effect the biosphere

Study this image which statement best describes the rock shown check all that apply