The atoms, molecules, or compounds present at the start of a chemical reaction that participate in the reaction.
Which part of a chemical reaction does this define?
A. products
B. reactants
C. subscripts
D. coefficients
Which is a chemical reaction?
A. solid chocolate melting into liquid chocolate
B. a peanut shell cracking open into two halves
C. water vapor condensing into liquid water on a window
D. hydrogen gas and oxygen gas synthesizing into liquid water
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