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1-3 原子量與分子量 PowerPoint PPT Presentation


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1-3.1 原子量 1-3.2 分子量 1-3.3 莫 耳. 1-3 原子量與分子量. 原子的體積與質量皆非常微小,很難直接測量。但在化學反應中,原子質量的測定非常重要,科學家於是提出相對原子量的概念;原子量的概念確定之後,分子量也不難決定。. 1-3 原子量與分子量. 學習目標:. 了解 原子量 的意義、標準及平均原子量的概念。 了解 分子量 的意義及利用原子量算出分子量的方法。 了解 莫耳 及 亞佛加厥數 的意義,及其簡單的計算。. 原子量是指原子間的相對質量

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1-3 原子量與分子量

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1 3

1-3.1

1-3.2

1-3.3

1-3


1 3

1-3


1 3 1

1-3.1


1 3

.

1961IUPAC

amu(atomic mass unit)

1amu

16O

12C12amu

1 12C 1/12

16O12C


1 3


1 3

( )

A1A2

X1X2

12.0000amu 98.892%+13.0034amu 1.108%

=12.0111amu


1 3


1 3

2

1-4


1 3

1-4

38.96amu 93.258 + 39.96amu 0.012 + 40.96amu 6.7339.09 amu


1 3

12C 13C 651 12C 13C 991 12.011 (A)12.000(B)12.009 (C)12.015(D)12.980

1-4


1 3 2

1-3.2

  • 1(H2O)1.008amu2+16.00amu18.02amu

    2(CH4)12.01amu+41.008amu16.04amu

  • IUPACamu

  • 16.04


1 3 3

1-3.3

  • (mole)

  • 1 12 12C 6.021023

  • (NA)

  • 6.021023 1

  • 1

12C 12

Fe 55.85

CH416.04


1 3

1

He

C12H22O11

NaCl

C

Cu


1 3

1amu

12C 12 amu

12C 12

12 amu 6.021023 12

1 amu 1.661024


1 3


1 3

(1) 9.01 (2) 6.021022

1-5


1 3

3.0110222.30 1amu

1-5

X

X=46

1 46amu


1 3

(NA)

1 96500 1 (1F) 1 1 1 F96500NA e(e)

e 1.6021019 /

12


1 3

()

1.061011

2.20102(He4.003)

1

NA

1.061011864003653.3431018()


1 3

X NA

5.628 4 4 2.165 /

(1) 58.44 /(58.44/2.165)27.00(/)

(2)1

(3) NA


1 3

1. 1961IUPAC12(A)-12 (B)-13 (C)(D)-12

2.(A)w w amu(B) 12C12amu12.0000(C)x12C x/12(D)27.00 amu6.02102327.00


1 3

3.()

(A) 22

(B) 18

(C) 1

(D) 12.012C

4.0.44CO2(C=12,O=16)

(A) 6.02 1023

(B) 6.02 1021

(C) 1.806 1022

(D) 1.806 1024


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