When we ____ salt in water, the substances present were still water molecules and ____ particles. Nothing new was made, the two substances just ____. When we mixed and ____ iron and sulphur, the atoms of the two substances recombined to become ____, making iron sulphide (a ____ substance). Dissolving is a ____ change and not a ____ change.

SB2 L022 Dissolving vs Reacting

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