skills practice answers
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Skills Practice Answers. Skills Practice 1. 9,434,880 mL 17.8 cases 0.333 pallet a) 0.1560 m b) 4.1x10 10 c) 92,000 μ m d) 91,600 nm a) 2.229x10 7 b) 8.07x10 6 c) 5.41x10 20 d) 1.12x10 7 a) 2.300021x10 10 b) 3.51x10 -9 a) 235,400 b) 0.000000003400. Skills Practice 2. 325.2 - PowerPoint PPT PresentationTRANSCRIPT
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Skills Practice Answers
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Skills Practice 1
1. 9,434,880 mL2. 17.8 cases3. 0.333 pallet4. a) 0.1560 m b) 4.1x1010 c) 92,000 μm d) 91,600
nm5. a) 2.229x107 b) 8.07x106 c) 5.41x1020 d) 1.12x107
6. a) 2.300021x1010 b) 3.51x10-9
7. a) 235,400 b) 0.000000003400
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Skills Practice 2
1. 325.22. 18,0003. 0.01754. 0.7905. 28,910,0006. 277. 4.9x1012
8. 1.86x105
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Skills Practice 81. a) 21 b) Scandium (Sc) c) 222. Atoms of the same element (having the same
number of protons) with a different number of neutrons.
3. a) -2 b) sulfur c) 174. 1;35. +26. 307. B) ions8. Strontium (Sr)
Symbol neutrons protons electrons atomic # mass #
80 56 54 56 136
31 25 25 25 56
120 79 79 79 199
21 20 18 20 41
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Skills Practice 9
1. a) 74.92 amu b) Arsenic (As)2. a) 51.99 amu b) Chromium (Cr)3. The most abundant is the one with a mass of
40.00 amu. 4. 41.996 amu
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Skills Practice 10
1) Ground state: the normal energy level that an electron occupies. Excited state: when an electron has absorbed energy to occupy a higher energy level.
2) 7.11x10-8 m3) 8.62x10-20 J4) 3.68x10-19 J5) a) 8.52x1014 Hz b) 5.65x10-19 J6) f=7.68x1014 Hz wavelength= 3.91x10-7 m
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Skills Practice 11
1) There is no such thing as an f sublevel in the third energy level. Also, an f sublevel if it existed would have seven orbitals instead of four.
2) 83) 104) 25) Orbitals = 9 Electrons =186) 507) 4p
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Skills Practice 13
1) a. ends in: 3d b. ends in: 4d c. ends in: 4p2) a. 1s22s22p63s23p64s23d4
b. 1s22s22p63s23p64s23d104p65s24d105p3 c. 1s22s22p63s23p64s2
3) Because of Hund’s Rule the 2p sublevel should look like: 1s 2s 2p4) Three
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Skills Practice 14
1. a. 5 b. 2 c. 6 d. 8 e. 72. a. 2-8-3 b. 2-6 c. 2-8-63. Column 14 or IVA4. a. 5 dots b. 2 dots c. 4 dots d. 7 dots
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Skills Practice 15
1. Abbreviated electron configurations: a. [Ar] 4s23d104p2
b. [Xe] 6s2
c. [Ar] 4s23d104p5
d. [Xe]6s24f145d106p3
e. [Ar] 4s23d5
f. [Xe]6s24f145d9
2. Column 6 (or VIB)3. 5th row4. 3rd row5. Each d sublevel can hold 10 electons6. Each p sublevel can hold 6 electrons
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Skills Practice 16
1. The second energy level feels a +13 charge and the outer energy level feels a +5 charge.
2. Sulfur’s outer level of electrons feels a +6 charge pulling on it from the nucleus. Silicon’s outer level feels a weaker charge of +4 and therefore it is not pulled as close to the nucleus as sulfur’s outer level.
3. Chlorine is lower in the periodic table which would indicate that it is larger than lithium, but it is also located further to the right which would indicate that it is smaller.
4. a) S, Al, Mg, Na b) C, Si, Sn, Pb c) Br, Se, Ca, K d) C, B, Be, Mg, Ca e) Cl, P, Al, Ga
f) Ne, O, S, Se
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Skills Practice 17
1. It is relatively hard to remove the first electon. 2. a) Ca, As, Se, Br b) Bi, As, P, Nc) Ga, Al, Si, S d) K, Li, C, O e) Po, Te, S, O e) In, Sn, Te, I 3. Beryllium; After its two outermost electrons are removed, the next electron would need to be removed from an inner energy level, which is much more difficult. 4. Larger atoms tend to have smaller first ionization energies because the outer electrons are farther from the nucleus. Since the electrons are farther, the force of attraction from the nucleus is less.
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Skills Practice 18
1. Fluorine atom: 2-7; Fluorine ion: 2-82. 0; all atoms have a neutral charge. 3. +24. -2, -1, -1, +2, +1, +2, +3, -3, -2, -1, +2, +1
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Skills Practice 191. Ion Symbol
a. P-3
b. Mg+2
c. Rb+1
d. F-1
e. Al+3
f. S-2
2. Rewritea. BaSb. Rb3N
c. LiCld. AlNe. MgBr2
f. Al2O3
3. Formulasa. Na2S
b. AlCl3
c. Ca3P2
d. BaO
4. Namesa. Sodium sulfideb. Aluminum chloridec. Calcium phosphided. Barium oxide
5. +1, +2, +3, +/-4, -3, -2, -1
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Skills Practice 201. LiC2H3O2
2. Na3PO4
3. Mg(OH)2
4. Omit5. (NH4)2S
6. K2O
7. AlPO4
8. NaOH9. Omit10.Omit
11.Calcium oxide12.Barium chloride13.Potassium phosphate14.Magnesium hydroxide15.Omit16.Sodium acetate17.Lithium sulfate18.Ammonium sulfate19.Aluminum cyanide20.Beryllium chlorate
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Skills Practice 21
1. MnF4
2. (NH4)3PO4
3. Ni(NO3)2
4. Na3N
5. Al2(SO4)3
6. Cr(OH)3
7. Fe3(PO4)2
8. CuCl2
9. Copper(II) oxide10.Iron(II) sulfate
11.Ammonium sulfide12.Nickel(II) Phosphate13.Chromium(III)
hydroxide14.Barium chlorate15.Manganese(IV) nitride16.Copper(I) carbonate17.618.319.420.8
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Skills Practice 221. Dinitrogen pentoxide2. Triphosphorus heptoxide3. Trisulfur tetrafluoride4. Carbon dioxide5. Dinitrogen hexoxide6. Copper(II) sulfate7. Ammonium carbonate8. Sulfur hexafluoride9. H2O4
10.N3S5
11.CO2
12.N20
13.Fe(NO3)2
14.CCl4
15.C3H7
16.H3PO4
17.NO2
18.CH2
19.C6H9O
20.N2H3O2
21.S2O7
22.C4H3O4
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Skills Practice 28
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Skills Practice 29
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Skills Practice 301) 7.02 x 1024 molecules2) 1121 grams3) Quantity of particles needed to equal an
element’s atomic mass in grams. 4) 1180 grams5) 183.4 amu; 183.4 g/mol6) 3.32 moles7) 1.22 x 1024 atoms 8) 78.6 g/mol9) 4655 grams10)1.81 x 1024 molecules
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Skills Practice 31
1)15.4%2)a- 25.8% b- 64.7%3)a- 53.8% b- 34.4%4)N2O5
5)N3O6
6)a- C3H4O b- C24H32O8
7)C18H27O36
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Skills Practice 32
1)35.0 g Li; 345 g LiNO3; 100 g Ca
2)117 g Na3P
3)229 g CO2; 117 g H20
4)181.7 g Al(NO3)3; 142 g CaCl2
5)41.8 g of each product
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Skills Practice 35
1. a) 312 K b) -1460 C2. 3.67 L 3. 3.28 K4. 2.98 L5. 20 L 6. 15.99 L7. 45.8 kPa8. 0.133 kPa9. 541.2 kPa
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Skills Practice 36
1. a) 0.343 moles b) 8.68 L3. 0.104 kPa*L/mol*K4. 39.97 g/mol – Argon5. 138.6 g6. a) 7.15 x 10-4 mol b) 24.5 L7. 19.6 L
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Skills Practice 37
1. 49.8 L; 33.6 g2. 45.0 L3. 485 L4. 4.62 L5. 1550 L
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Skills Practice 38
1. a) 97.6 kPab) 6.9 x 10-4 moles c) 25.4 L2. 3.38 x 10-3 mol HCl3. 1.68 L 4. P(hydrogen)= 60 kPa; P(Oxygen)= 40 kPa5. 3.94 g