Δ→ triangle indicates that the reaction is being heated.
What is a chemical equation?
Chemical equations are symbolic representations of chemical reactions in which the reactants and the products are expressed in terms of their respective chemical formulae.
To express heating, we usually use Δ over reaction arrows like:
[tex]CaCO_ 3[/tex]. Δ → [tex]CaO+O_2.[/tex]
Learn more about the chemical equation here:
https://brainly.com/question/20492533
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