1) NH3 Mr(NH3) = 14 + 1*3 = 17 (2)
2) О3 Mr(O3) = 16*3 = 48 (4)
3) H2S Mr(H2S) = 1*2 + 32 = 34 (1)
4) HCl Mr(HCl) = 35,5 + 1 = 36,5 (3)
1) NH3 Mr(NH3) = 14 + 1*3 = 17 (2)
2) О3 Mr(O3) = 16*3 = 48 (4)
3) H2S Mr(H2S) = 1*2 + 32 = 34 (1)
4) HCl Mr(HCl) = 35,5 + 1 = 36,5 (3)