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What must happen before a chemical reaction can begin?
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What must happen before a chemical reaction can begin?

User Cattode
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Yes two reacting substances must collide.
User Thealeksandr
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In order for a chemical reaction to being, two reactants must come into contact with one another. Reactions occur when two or more molecules interact and the molecules change. Bonds between atoms are broken and created to form new molecules
User Carson Wood
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