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3. The chemical equation for what happened to the zinc in the boiling sodium hydroxide is written below:
Zn (s) + 2 NaOII (aq) + 2 H20 (1) ► NazZn(OII)4 (aq) + II2 (g)
Does this equation represent a physical change or a chemical change? How do you know?
physical change

Respuesta :

znk

Answer:

Chemical change  

Explanation:

Zn(s) + 2NaOH(aq) + 2H₂O(ℓ) ⟶ Na₂Zn(OH)₄(aq) + H₂(g)

A chemical change involves the formation of new substances with different properties.

The solid zinc disappeared, and a gaseous substance was formed, so this was a chemical change.

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