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<span>Carbonic acid is referred to as volatile acid because it is produced from a gas that evaporates quickly.
Volatility is the likeliness of a substance to vaporize. That is the tendency of the substance to pass to the gaseous phase. That means that these substances have a high vapor pressure. Coming from a gas, Carbonic Acid has a high tendency to pass to the vapor phase.
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i believe the answer would be D. When ordered by atomics mass every eighth element has similar properties.
Answer:
The concentration of hydroxide ions in a 3.5 is
C. 10.5