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https://www.powtoon.com/c/c9BKJoqMRdX/1/m

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Comparison between atomic radii and its cation | Created using Powtoon - The Visual Communication Platform

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EC015 Chemistry: 2.1 Bohr's Atomic Model

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4(b) 7.317 x 1014
5 b) i) 97.23 nm and = 3.085´10 ¹⁵ s-1
ii) = 1282 nm and                                                = 2.340´10 14 s-1
6 a) red = 3.031´10⁻¹⁹ J @ 3.031´10⁻²² kJ

green= 4.09´10⁻¹⁹ J @ 4.09´10⁻²² kJ

blue  = 4.581´10⁻¹⁹ J @ 4.581´10⁻²² kJ
b) red n ₂ =3
green       n ₂ =4
blue       n ₂ =5

7.energy = - 4.578´10⁻¹⁹ J @ 4.578´10⁻²² kJ
wavelength = 4.3447´10⁻⁷ m @ 434.5 nm

8. wavelength        = 6.563´10⁻⁷ m @ 656.3 nm

frequency        = 4.571´10 ¹⁴ s-1

9. wavelength = 5.45´10⁻⁸ m @ 54.5 nm
energy = 2195.558 kJ mol⁻¹

10.  = 1312.360 kJ mol⁻¹

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3. 8.46
4. 36.0
5. d) 66.7
e) 90.62%
6. b) 0.09 g
c) 0.067 M
d) 0.00262
e) 57.14%
7 b) (iii) 0.05045 mol
8 b) 40.23%
9 c) 0.0110 M

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Balance Equation By Inspection & Ion Electron Method

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How to calculate mole fraction, molarity and percentage by mass

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Molarity, Molality, Mole Fraction & Percentage by Mass

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1.3 Stoichiometry

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Topic: Matter
Subtopic 1.1 & 1.2

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Determine Empirical & Molecular Formulae From Combustion Data

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Experiment 1: Determination Of The Formula Unit Of A Compound

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TEMPLATE REPORT EXP DETERMINATION FORMULA UNIT ZINC CHLORIDE

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Soalan objektif, jom jwb sama2

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Nota kuliah 29/7/2021

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Matter 1.1 & 1.2-madamyusmawati Flip PDF | AnyFlip

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Check Matter 1.1 & 1.2 from madamyusmawati here. Like Matter 1.1 & 1.2? Just add Matter 1.1 & 1.2 of madamyusmawati to My Favorites. Embed Matter 1.1 & 1.2 to websites for free. Check 13 flipbooks from madamyusmawati. Upload PDF to create a flipbook like Matter 1.1 & 1.2 now.

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7. (a) 3.0 x 10⁻³ mol NH ₃
(b) 2.258 ´ 10 ²¹ O ₂ molecule

(c) 0.090 g

8. (a) 4.4 g
(b) (i) 0.05 mol P ₄ O ₁₀
(ii) 14.2 g
(iii) 1.12 L
(iv)1.20 L

9 (a) 8.04 x 10⁻⁴ mol NO
(b) 0.52%

10. (a) Empirical formula   -      formula that shows the simplest ratio of atoms of different elements                                              present in a  molecule

Molecular formula    -     formula that shows the actual number of atoms of different elements present in a molecule

(b) C ₃ H ₈ N
(c) C ₆ H ₁₆ N 2

11. empirical formula: C ₄ H ₅ ON ₂
Molecular formula  =  C ₈ H ₁₀ O ₂ N ₄

12. b(i) 172.4 ml
(ii) 0.72M
(iii) 0.73 m

13. 0.891 M @ mol L–1 @ mol dm-3

14. (a) 0.3 m
(b) 0.3 M
(c) 0.00537
(d) 1.723 %

15. (a) 0.159
(b) 29.58%
(c) 9.83 M

16 (a) 27.75 M
(b) 2.882 ´ 10–3 L @ 2.882 mL

17. (a)0.10 M
(b) 0.00125 mol H ₂ SO ₄

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Boleh jawab soalan Pre Lab ya..nk bcg esok

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1.1 Atoms and Molecules
1.2 MOle Concept

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1 (a)        C₁₂H₂₂O₁₁          = 12(12.0) +22(1.0) + 11(16.0) = 342

(b)        Mg₃(PO₄)₂         = 3(24.3) + 2[31.0 + 4(16.0)] = 262.9

(c)        Ca₃(PO₄)₂         = 3(40.1) + 2[31.0 + 4(16.0)] = 310.3

(d)        (NH₄)₂SO₄         = 2[14.0 + 4(1.0)] + 32.07 + 4(16.0) = 132.1

(e)        CuSO₄.5H₂O     = 63.6 + 32.07 + 4(16.0) + 5[2(1.0) + 16.0] = 249.7

2. 2.324´10⁻²³ g

3.(a) 1.260 mol Al(OH)3
(b) 64.452 mol Ni
(c) 4.153´10⁻¹ mol C ₂ H ₆ O
(d)3.00 ´ 10⁻² mol O ₂
(e) 0.250 mol H ₂ SO 4
(f) 0.536 mol N ₂

4. (a) 1.36 x10 ²²   atoms
(b) 2.79 x10 ²²   atoms
(c) 3.956 x10 ²⁴   molecules

(d) 3.956 x10 ²⁴   molecules

(e) 2.68 x 10 25  H atoms
(f)6.02´10 ²³ atoms C

5. (a) 323.2 g mol–1
(b) 3.34 ´10⁻³ mol
(c) 2.01 ´10 ²¹ molecules

(d) 4.02 ´ 10 ²² H atoms

(e) 0.321 g C

6. (a) 7.95 L
(b) 16.35 g
(c) 13.81 L