Answer:
The correct answer is C) B is a base. I just did it.
Explanation:
See picture for explanation.
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A. molecule is created when two of more atoms are chemically bonded .
Acid when it touch metal hope this help :*)
Answer: The correct answer is D.
Explanation: In a chemical reaction, when there is changing of ions taking place and is leading to the formation of a gas can be considered as a single displacement reaction.
Single-Displacement reactions are defined as the reactions in which a higher reactive metal displaces a lower reactive metal. This is in reference to the reactivity series.
Hydrogen lies below in the reactivity series and when the higher reactive metal displaces hydrogen from a chemical reaction, it leads to the formation of hydrogen gas.
Example: