In the expression,3CaBr₂,

Name: In the expression,3CaBr 2 ,
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In chemical formulas, subscripts indicate the number of atoms of an element in a molecule, while coefficients indicate the number of molecules of a compound in a chemical reaction. In the expression given, 2 is a subscript indicating there are 2 atoms of sulfur while 3 is a coefficient indicating there are 3 molecules of the compound CaBr₂. Therefore, the best choice is C: 2 is a subscript and 3 is a coefficient.

In the Expression,3CaBr2

In the Expression,3CaBr₂