Literacy 1. Calculate mass percentage of
oxygen w(0) in following com-
pounds. Use the Periodic Table to
find atomic masses of elements.
A1203, K2Cr2O7, CaCo3, Mg(OH)2.
2. Find chemical formula of the
following compounds with given
mass percentages:
ZnO, w(Zn) = 80.2% and w(0)
= 19.8%;
Mnх Clу, w(Mn) = 27.9%
Use the Periodic Table to find
atomic masses A, of elements.​

Билингвальный учебник химии 8го класса.

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