Question

question 3
chemical reactions are
changing the way something smells.
breaking apart atoms.
changing two items into another item.
rearranging gasses in the air.

Explanation:

• A chemical reaction involves the transformation of reactants (starting substances) into products (new substances) by rearranging atoms.
• "Changing the way something smells" is a possible sign of a chemical reaction but not the definition.
• Atoms are not broken apart in chemical reactions (nuclear reactions do that).
• Chemical reactions aren't just about rearranging gases in the air; they involve various substances.
• "Changing two items into another item" (reactants to products via atom rearrangement) fits the definition of a chemical reaction.

Answer:

C. changing two items into another item.