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

 

     
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