October 2018 1 38 Report
Wskaż grupę związków w których chrom jest wyłączne VI-wartościowy. a. Cr2O3 , Na2CrO4, Cr2(SO4)3 b. Cr(OH)3 , CrO3 ,Cr(NO3)3 c. K2Cr2O7, Na2CrO4, CrO3 d. CrCl3, K2CrO4, Cr2O3
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