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Physical change, chemical change or both kinds of change? 1. Sodium hydroxide dissolves in water (both)
2. Hydrochloric acid reacts with sodium hydroxide to produce a salt, water and heat (chemical) 3. A pellet of sodium is sliced in two (physical) 4. Water is heated and changed to steam (both) 5. Potassium chlorate decomposes to potassium chloride and oxygen gas (chemical) 6. Iron rusts (chemical) 7. Ice melts (physical) 8. Acid on limestone produces carbon dioxide gas (chemical) 9. Milk sours (both) 10. Wood rots (chemical)

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