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In Science

What is Na2S?

It is a Ionic bond between Sodium Ions and Sulfide Ions. The formula name is Sodium Sulfide.
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In Uncategorized

What does relative age indicate?

relative age means the process of determining the age of rock layers based on their relationship to each other.
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In Science

What happens to water when add indicator?

water is pretty neutral in terms of the pH scale, so nothing should happen unless you have poisoned water .It'll turn green if you used universal indicator(pH7), after you add (MORE)