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3. The correct coefficients for the equation KCIOKCI + O2 are
A. 2, 2, 3
B. 3, 2,2
C. 2, 3,2
D. 2, 1, 3
4. Balancing a chemical equation involves
A. adjusting the subscripts
B. adjusting both subscripts and coefficients
C. adjusting the coefficients
D. adjusting the masses of reactants and products​