А95 Определите степень окисления фосфора в соединениях

А95 Определите степень окисления фосфора в соединениях

95. Определите степень окисления фосфора в соединениях: PH3; H3PO4; Na4P2O7; Mg3P2; NaH2PO3.

Additional information:

The objectives of the manuals "Chemistry. Guidelines, work program and control tasks, "ed. prof. VA Averyanov, Part 1, Tula, 2004.
Many problems have been successfully surrendered !!!
For any questions (explain answer additional questions of the teacher, etc.) can be treated as Seller is the direct executors of tasks.
Tasks performed in Microsoft Word, graphics - in Microsoft Exel or OriginPro; formula typed in MathType (if formulas are unreadable signs, then you must install the editor); files are archived WinRAR.