Hej!
m NH₃ = 14 u + 3 * 1 u = 17 u
m FeCl₂ = 56 u + 2 * 35 u = 56 u + 70 u = 126 u
m NO = 14 u + 16 u = 30 u
m Mn₂O₇ = 2 * 55 u + 7 * 16 u = 110 u + 112 u = 222 u
m Al₂S₃ = 2 * 27 u + 3 * 32 u = 54 u + 96 u = 150 u
m H₂SO₄ = 2 * 1 u + 32 u + 4 * 16 u = 2 u + 32 u + 64 u = 98 u
m Na₂SO₄ = 2 * 23 u + 32 u + 4 * 16 = 46 u + 32 u + 64 u = 142 u
m MgO = 24 u + 16 u = 40 u
m HNO₃ = 1 u + 14 u + 3 * 16 u = 15 u + 48 u = 63 u
m H₂CO₃ = 2 * 1 u + 12 u + 3 * 16 u = 2 u + 12 u + 48 u = 62 u
m Al₂O₃ = 2 * 27 u + 3 * 16 u = 54 u + 48 u = 102 u
m CH₄ = 12 u + 4 * 1 u = 16 u
m CH₃OH = 12 u + 4 * 1 u + 16 u = 12 u + 20 u = 32 u
m PbS₂ = 207 u + 2 * 32 u = 207 u + 64 u = 271 u
m C₂H₆ = 2 * 12 u + 6 * 1 u = 24 u + 6 u = 30 u
m CuO = 64 u + 16 u = 80 u
m H₃PO₄ = 3 * 1 u + 31 u + 4 * 16 u = 34 u + 64 u = 98 u
m NaCl = 23 u + 35 u = 58 u
m C₂H₅OH = 2 * 12 u + 6 * 1 u + 16 u = 24 u + 22 u = 46 u
m CO₂ = 12 u + 2 * 16 u = 12 u + 32 u = 44 u
m MgS = 24 u + 32 u = 56 u
m Cu(OH)₂ = 64 u + 2 * 16 u + 2 * 1 u = 64 u + 34 u = 98 u
m Mg(NO₃)₂ = 24 u + 2 * 14 u + 6 * 16 u = 24 u + 28 u + 96 u = 148 u
Pozdrawiam! - Julka
