Answer: concentration
Explanation:
Concentration refers to the amount of a substance present in a sample. The more molecules of a substance present in a sample, the greater its concentration. The less molecules of a substance in a sample, the lesser the concentration. We are often concerned about analytically determining the concentration of a substance using diverse analytical methods in chemistry.
Acid + alkali ------> salt + water
2KOH + H2SO4 ------> K2SO4 + 2H2O
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Answer:
B
It defines the concept of conservation of matter.
Explanation:
