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What does adding a catalyst do to a reaction?
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Are chemical reactions reversible?
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What are the substances in a reaction called?
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What do different reactions require?
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What is in-between the reactants to the products?
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What is an endothermic reaction?
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What happens to atoms in a reaction?
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2H2 +O2= ?
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What might you see in a chemical reaction?
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What do all chemicals reactions involve?
