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Molar Mass
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Molar mass is a physical property that is described by the number of grams (g) per unit mole. The unit for molar mass is g mol-1 (or kg mol -1 which is not commonly used). The molar mass of an element is obtained from the atomic mass of the element. Examples of some common elements with their respective molar mass are

element
(symbol)
number of protons
molar
mass
of
element
(atom)
(g/mol)
molar
mass
of
element
(molecule)
(g/mol)
hydrogen
(H)
1 1 H2
2
helium
(He)
2 4
lithium
(Li)
3 7
carbon
(C)
6 12
nitrogen
(N)
7 14
N2
28
oxygen
(O)
8 16
O2
32
fluorine
(F)
9 19
F2
38
sodium
(Na)
11 23
magnesium
(Mg)
12 24
aluminium
(Al)
13 27
silicon
(Si)
14 28
phosphorus
(P)
15 31
sulphur
(S)
16 32
chlorine
(Cl)
17 35.5
Cl2
71
potassium
(K)
19 39
calcium
(Ca)
20 40
vanadium
(V)
23 51
chromium
(Cr)
24 52
manganese
(Mn)
25 55
iron
(Fe)
26 56
copper
(Cu)
29 63.5
zinc
(Zn)
30 65.5
bromine
(Cl)
35
80
Br2
160
silver
(Ag)
47 108
tin
(Sn)
50 119
iodine
(I)
53 127
I2
254

 


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  Jisim Molar

     
Jisim molar merupakan kuantiti fizikal. Ia dihuraikan dengan bilangan gram (g) per unit mol. Unit untuk jisim molar ialah g mol-1 (atau kg mol -1 tetapi unit ini tidak biasa digunakan).  Jisim molar sesuatu unsur diperolehi daripada jisim atom unsur tersebut. Contoh-contoh unsur dengan jisim molar adalah seperti yang terbentang dalam jadual di bawah.

unsur
(simbol)
bilangan proton
jisim
molar
unsur
(atom)
(g/mol)
jisim
molar
unsur
(molekul)
(g/mol)
hidrogen (H)
1 1 H2
2
helium
(He)
2 4
lithium
(Li)
3 7
karbon
(C)
6 12
nitrogen
(N)
7 14
N2
28
oksigen
(O)
8 16
O2
32
fluorin
(F)
9 19
F2
38
natrium
(Na)
11 23
magnesium
(Mg)
12 24
aluminium
(Al)
13 27
silikon
(Si)
14 28
fosforus
(P)
15 31
sulfur
(S)
16 32
klorin
(Cl)
17 35.5
Cl2
71
kalium
(K)
19 39
kalsium
(Ca)
20 40
vanadium
(V)
23 51
kromium
(Cr)
24 52
mangan
(Mn)
25 55
besi
(Fe)
26 56
kuprum
(Cu)
29 63.5
zink
(Zn)
30 65.5
bromin
(Cl)
35
80
Br2
160
perak
(Ag)
47 108
timah
(Sn)
50 119
iodin
(I)
53 127
I2
254
 

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