Page:Outlines of Physical Chemistry - 1899.djvu/33

 MXXLECULAB WEIGHT

�� �Molecular Weights-

�—contimied

� �M

� �Temperature

�Oxygen

�at

�0°

�Sulphur

�H

�860° and at 1,500°

�»»

�450°

�Chlorine

�»»

�200°

� �[46-50]

�»J

�1,567°

�Cadmium.

�»

�1,040°

�Phosphorus

�»)

�500° and at 1,040°

�Bromine

�>>

�100°

� �less

�»»

�1,500°

�Selenium.

�>>

�1,420°

�Mercury.

�>>

�424° and at 1,560°

�Iodine

�»»

�185° „ 500°

� �.a half less

�»>

�1,700°

�Tellurium.

�»>

�1,440°

�Arsenic

�860°

��Molecular Weights of Compounds

These are determined in the same way, and are subject to the same corrections as those of the elements. For example : Equivalents. . 1-00 for hydrogen

35*37 for chlorine

��Sum

��36*37 = corrected molecular weight

��Sulphurous anhydride : d = 2-247 which gives m = 64-87. In 64*87 parts of sulphurous anhydride there are :

��Corrected molecular weight

�� �