oblicz masy czasteczkowe nastepujacych substacji:H2SO3,Cl2O7,P4

H2SO3 2+32+(3x16)=82u   Cl2O7 (2 x 35,5) + (7x16)=183u   P4 31x4=124u

MH = 1u MS= 32u MO= 16u MP= 31u MCl= 35,5u   H₂SO₃ = 2MH + MS + 3MO = 2 + 32 + 3×16 = 34 + 48 = 82u   Cl₂O₇ = 2MCl + 7MO = 2 × 35,5 + 7 × 16 = 70 +112 = 183u   P₄ = 4MP = 4 × 31 = 124u    

mH₂SO₃=2 x 1u + 1 x 32u + 3 x 16u=82u mCl₂O₇= 2 x 35,5u + 7 x 16u =183u mP₄= 4 x 31u=124u