chapters 2 and 3 review worksheet
DESCRIPTION
Chapters 2 and 3 Review Worksheet. Problem 1:. First find the volume:. V = ℓ wh. V = (3.54 yd)(6.39 yd)(11.8 yd). V = 267 yd 3. Problem 1 (continued):. Convert the answer (267 yd 3 ) to nm 3. 1. m 3. 267. yd 3. 10 27. nm 3. 1. m 3. 1.3079. yd 3. = 2.04 x 10 29 nm 3. - PowerPoint PPT PresentationTRANSCRIPT
Chapters 2 and 3Review
Worksheet
Problem 1:First find the volume:
V = ℓwhV = (3.54 yd)(6.39 yd)(11.8 yd)
V = 267 yd3
Problem 1 (continued):Convert the answer (267 yd3) to nm3
1027 nm3
1 m3
1 m3
1.3079 yd3
267 yd3
= 2.04 x 1029 nm3
Problem 2:Convert 9.04 x 108 in3 to Tm3
Tm311042 cm3
9.04 x 108
1cm3
in3
16.4 in3
= 1.48 x 1048 Tm3
Problem 3:Convert 947,200 m3 to mi3
1mi3
1.47 x 1011 ft3
1ft3
1728in3
1in3
= 2.274 x 1022 mi3
cm316.41 cm3
m31012
947,200m3
Problem 4:
D = m/V
D = (5.36 kg)/(640 mL)
D = 0.0084 kg/mL
Problem 5:First convert 453 hm3 to mL
mL11 cm3
4531
cm3
hm3
1012 hm3
= 4.53 x 1014 mL
then....................
Problem 5: (continued)Now find the volume:
D = m/V so M=DV
M = (0.537 g/mL) (4.53 x 1014 mL)
M = 2.43 x 1014 g
Problem 6: 1 calorie = 4.184 J
4.184 J1 cal
135 cal = 565 J
Problem 7:
Problem 8:
cal14.184 J
1.94 x 1014
1J
MJ106 MJ
= 4.64 x 109 cal
Problem 9:
Kelvin = Celsius + 273
Kelvin = 43 + 273
Kelvin = 230 K
Problem 10:Kelvin = Celsius + 273
293 K = Celsius + 273
293 K 273 = Celsius
20 C = Celsius
Problem 11:
(i) chemical change
(ii) chemical property
(iii) physical change
(iv) physical property
12. During electrolysis, an electric current is passed through a substance. If the substance is a compound, it may be broken down into the separate elements that form it.
13. filtration14. distillation, crystallization, and chromatography
15. kinetic, radiant, and potential
16. solid, liquid, gas, and plasma
17. chemical, electrical, and gravitational18. Dalton, schoolteacher19. Democritus, philosopher
20. scanning tunneling microscope
21. Faraday, chemist
22. “elektron” is the Greek word for amber (fossilized tree sap which when rubbed with cloth would attract dust and other particles – static electricity)23. Ben Franklin, He flew a kite with a key on its string during a thunderstorm.
24. J.J. Thomson, physicist, He discovered electrons.
25. Henri Becquerel, physicist
26. Ernest Rutherford, scientist, He discovered the nucleus (positively charged)27. The plum-pudding model states that negative charges are distributed evenly throughout an atom’s positively-charged interior. Rutherford found that the positive charges were centrally located in a core.
28. number of protons = atomic number
29. mass number = protons + neutrons30. Average atomic mass is a weighted average of all of the isotopes of an element. Multiply the abundance percentage by the mass number for all the isotopes and add them together.
Problem 31:
(i) 194Os+4 P = 76, N = 118, E = 72
(ii) 116In+3 P = 49, N = 67, E = 46
(iii) 129Te2 P = 52, N = 77, E = 54
(iv) 227Ra P = 88, N = 139, E = 88
Problem 32:
(i) 97Mo+6
(ii) 33P3
(iii) 244Pu+5
Problem 33:
Average Atomic Mass =
51(.9975) + 50(.0025)
Average Atomic Mass = 50.9975
Problem 34:
Average Atomic Mass =
90(.5145)91(.1122)92(.1715)94(.1738)96(.0280)
Average Atomic Mass = 91.3184
+______________
Problem 35:
Ga-69Ga-71
Abundance = x
69x + 71(1 x) = 69.72Abundance = 1 x
69x + 71 71x = 69.72 2x = 1.28x = 0.64
Ga-69 = 64%Ga-71 = 36%
Problem 36:
K-39K-41
Abundance = x
39x + 41(1 x) = 39.0983Abundance = 1 x
39x + 41 41x = 39.0983 2x = 1.9017x = .95085
K-39 = 95.085%K-41 = 4.915%
37. 217Rn 42He + 213Po
38. 138Cs 0–1e + 138Ba
39. 17F 01e + 17O
40. 7Be + 0–1e 7Li
41. 212At 42He + 208Bi
42. 117Ag 0–1e + 117Cd
43. Ba yellow-green
44. Co not visible45. K violet46. Cu turquoise-green
47. Na yellow
48. Sr red 49. Ca orange-red