Question

Taylor is learning about pure substance and mixture. In her notes, she included a table with the properties of pure substances and mixtures. or Science8.U4L13Review.Spring24 Answers
1. Mixtures are substances that are not chemically combined.
2. Flask A
3. O
4. Substance A is a mixture, substance B is an element, and substance C is a compound.
5. Particles in an object move faster at 50°C than at 20°C.
6. The energy is increasing, but the temperature stays the same.
7. Liquid
8. Condensation
9. B on top, C in middle, A at bottom
10. Freezing point
11. 2.5 g/mL
12. A raw egg is less dense than salt water but more dense than tap water.
13. The molecules will rearrange to form new chemical bonds.
14. Physical
15. False
16. Heat and light are produced
17. F
18. One atom of iron would have 26 electrons, 26 protons, and 30 neutrons.
19. Phosphorus
20. In Group 1
21. The mass of the gasses and the ash should equal the mass of the original stack of newspapers.
22. 10 grams
23. the same number of atoms of each element.
24. 2

Answer 1

5 g/mL
25. True
26. Melting
27. 7 on top, 4 in middle, 6 at bottom
28. Evaporation
29. Distillation
30. True

These are the correct answers for the properties of pure substances and mixtures quiz.