A chemical reaction is balanced by applying all except which of the following principles?
A) No atoms are gained, lost, or changed in identity.
B) Only the numbers preceding formulas can be changed.
C) The set of smallest whole numbers should be used.
D) Subscripts in the formulas may be changed if necessary.

Question

Quizplus · Accepted Answer

Changing subscripts in formulas alters the identity of the compounds involved, violating the law of conservation of mass. The correct way to balance equations is by adjusting coefficients, not subscripts.

A Chemical Reaction Is Balanced by Applying All Except Which