Answer:
The answer to your question is: H₂CO₃ is a strong acid
Explanation:
HCl is a strong base. This option is wrong because HCl is a strong acid.
Water is a strong acid. Water is a neutral substance it is neither an acid nor a base.
HCO 3 is a strong acid. I can see clearly the molecule but if it were H₂CO₃ , it would be carbonic acid which is a strong acid, but if not, this aswer is wrong.
Ammonia is a strong base. This answer is incorrect, Ammonia is a weak base.
Answer:
Ores mined from shields.
Explanation:
Ores mined from shields are the source from which we get the history of Precambrian rocks. The Ores from shield experience the Precambrian era so that's why its rocks provides information about that era. The Precambrian supereon is the division of the geological time scale which is the first and longest stage in the history of the Earth which also includes the Hádic, Archaic and Proterozoic eons.
pH-pKa
<h3>What is a conjugate acid and base pair?</h3>
An acid-base pair that differs by one proton is referred to as a conjugate pair. A conjugate acid-base pair is a pair of substances that can both absorb and donate hydrogen ions to one another. A proton is added to the compound to create the conjugate acid, and a proton is taken out to create the conjugate base. When a proton is supplied to a base, a conjugate acid is created, and vice versa when a proton is taken away from an acid, a conjugate base is created.
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