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Independence University CHEMISTRY 101 CHE101 Week 1 02/18/19 1)Copper: 1
Independence University
CHEMISTRY 101
CHE101 Week 1 02/18/19
1)Copper:
1. Compound
2. Mixture
2. Water
1. Element
2. Compound
3. Mixture
3. Nitrogen 1. Element
2. Compound
3. Mixture
4. Sulfur
1. Element
2. Compound
3. Mixture
5. Air
1. Element
2. Compound 3. Mixture
6. Sucrose
1. Element
2. Compound
3. Mixture
7. A substance composed of molecules each of which contains two iodine atoms
1. Element
2. Compound
3. Mixture
8. Gasoline
1. Element
2. Compound 3. Mixture
Classify each of the following as chemical change or physical change
9. Coal burning
1. Chemical
2. Physical
10. Ice melting
1. Chemical 2. Physical
11. Mixing chocolate syrup with milk
1. Chemical 2. Physical
12. Explosion of a firecracker 1. Chemical
2. Physical
13. Magnetizing of a screwdriver
1. Chemical 2. Physical
14. How many protons does the isotope 105B have? 1. 5
2. 10
3. 6
4. 15
15. How many neutrons does the isotope 19980Hg have? 1. 80
2. 199
3. 119
4. 121
16. How many electrons does the isotope 6329Cu have? 1. 63
2. 29
3. 34
4. 92
17. How many protons does the isotope 136C have? 1. 13
2. 6
3. 7
4. 19
18. How many neutrons does the isotope 7734Se have? 1. 77
2. 34
3. 43
4. 111
19. What is the molecular formula of a compound that has 6 carbon atom, 8 hydrogen atoms, and 2 oxygen atoms?
2. C3H4O
3. CHO
4. 6C8H2O
20. What is the empirical formula of a compound that has 8 carbon atoms and 12 hydrogen atoms?
2. C2H3
3. C4H6
4. CH
21. What is the heaviest element of the alkali metals?
1. Lithium
2. Sodium 3. Cesium
4. Francium
22. What is the lightest element of the alkaline earth metals? 1. Beryllium
2. Calcium
3. Radium
4. Barium
23. What is the heaviest element of the halogens?
1. Bromine
2. Chlorine
3. Fluorine 4. Astatine
Give the name and symbol of the prefixes used with SI units to indicate multiplication by the following exact quantities
24. 103
1. kilo-, k
2. centi-, c
3. deci-, d
4. milli-, m
25. 10−2
1. kilo-, k
2. centi-, c
3. deci-, d
4. milli-, m
26. 0.1
1. centi-, c
2. deci-, d
3. kilo-, k
4. milli-, m
27. What is not true about protons and neutrons?
1. They have approximately the same mass
2. They have the same charge
3. They are located in the nucleus
28. What is not true about electrons?
1. They have a negative charge
2. Their mass is very light compared to protons and neutrons 3. They are in the center of the atom
For each of the following compounds, state whether it is ionic or covalent
29. KClO4
1. Ionic
2. Covalent
30. MgC2H3O2 1. Ionic
2. Covalent
31. H2S
1. Ionic
2. Covalent
32. Ag2S
1. Ionic
2. Covalent
33. N2Cl4
1. Ionic
2. Covalent
34. Co (NO3) 2
1. Ionic
2. Covalent
35. H2O
1. Ionic
2. Covalent
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