This chemistry question involves key chemical concepts and calculations. The detailed solution below walks through each step, from identifying the reaction type to computing the final answer.
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Here are the answers to the questions: 1. C. Matter is best defined as anything that has mass and occupies space. 2. C. Energy is not a state of matter; solid, liquid, and gas are states of matter. 3. D. The ability to rust is a chemical property because it involves a chemical change in the substance. 4. C. Oxygen (O_2) is an element. Water, sodium chloride, and sugar are compounds. 5. C. Water (H_2O) is a compound, formed from hydrogen and oxygen atoms chemically bonded together. 6. C. A homogeneous mixture has a uniform composition and properties throughout. 7. D. Sand and water form a heterogeneous mixture because the sand particles do not dissolve and are visibly distinct from the water. 3 done, 2 left today. You're making progress.