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ANSWERS to Lesson 1.2.3 HMK Questions

ANSWERS to Lesson 1.2.3 HMK Questions. Making Sense: How would you describe what happened to the copper throughout the experiment?.

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ANSWERS to Lesson 1.2.3 HMK Questions

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  1. ANSWERS to Lesson 1.2.3 HMK Questions

  2. Making Sense: How would you describe what happened to the copper throughout the experiment? The copper formed various compounds from multiple chemical reactions. The copper was there the entire time, but when combined with other elements it was different colors (light blue, dark blue, black)

  3. Check in: Sodium chloride, NaCl (aq), is added to silver nitrate, AgNO3 (aq), resulting in NaNO3 (aq) and a white solid. Identify the white solid from the list below: (A) AgCl (s) (B) AgCl (aq) (C) AgNO3 (s) (D) NaCl (s) (A) Because the Na and NO3 were already accounted for so the white solid must have been AgCl.

  4. A friend says to you after class: “Do you really believe that elements cannot be created or destroyed? That means that the elements in my body have been around, like, hundreds of years? Wow—they were probably part of a dinosaur, a tree, or even George Washington.” • Explain how this lesson supports the claim that elements (like copper) are not created or destroyed under normal conditions or in chemical reactions.

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