19.
1) Mr (K2O CaO) 39×2+16×1=94 mr 40×1+16×1=56
Omega (O) = 16×1/94 ×100 = 17,02 omega (O) = 16×1/56 ×100 = 28.57
2) mr (CO2 SO2) 12×1+16×2=44 Mr 32×1+16×2=64
Omega (O2) = 16×2/44×100= 72.72 omega (O2) = 16×2/64×100=50
3) Mr (FeOH Al2O3) 56×1+16×1+1×1=74 mr 27×2+16×3= 102
Omega (O) = 16×1/74×100= 21.62 omega (O3) = 16×2/102×100=31.37
4) mr (MgO NaOH) 24×1+16×1=40 23×1+16×1+1×1=40
Omega (O) = 16×1/40×100=40
20.
1) (HNO3 HPO3) 1×1+14×1+16×3=63 1×1+31×1+16×3=80
Omega (O3) = 16×3/63×100 =76.19 omega (O3) = 16×3/80×100=60
2) (H3PO4 H2SO4) 1×3+31×1+16×4=98 1×2+32×1+16×4=98
Omega (O4) = 16×4÷98×100=65.30
Դավիթ Հարությունյան 