Only A. Formation of a gas indicates a chemical reaction.
The other three choices are all physical changes.
It would go B. A. E. D. C.
Hope I helped!
Answer:
Krypton -73
Explanation:
There are 33 known isotopes of krypton (36Kr) with atomic mass numbers from 69 through 101.
Good luck!
Answer:
The major ionic constituents whose concentrations can be determined from the salinity are known as conservative substances. Their constant relative concentrations are due to the large amounts of these species in the oceans in comparison t