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2 all substances reacting before the arrow in chemical reactions
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2 all substances reacting before the
arrow in chemical reactions

User Mirianna
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Answer:

The substances to the left of the arrow in a chemical equation are called reactants. A reactant is a substance that is present at the start of a chemical reaction. The presence of the arrow also indicates that the reaction goes in one direction under the conditions indicated.

Step-by-step explanation:

User Smartmeta
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