2 9- July 8, 2019 16 32 64 128 2 9-х=14 7 2 9-dimethyl phenanthroline 2 9-dichloro-1 10-phenanthroline 2 9 2 912 2 9 as a decimal 2 903 2 931 2 928 2 99 2 9 as a percent 2 936 2 90 2 982 2 945
