| Wzór sumaryczny | Masa cząsteczkowa | Stosunek atomowy pierwiastków | Stosunek masowy pierwiastków |
| SiO2 | m = mSi + 2 ∙mO = 28 + 2 ∙ 16 = 60 u | 1 : 2 |
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| H2S | m = 2 ∙mH + mS = 2 ∙ 1 + 32 = 34 u | 2 : 1 |
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| Br2O5 | m = 2 ∙mBr + 5 ∙mO = 2 ∙ 80 + 5 ∙ 16 = 240 u | 2 : 5 |
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| PbO | m = mPb + mO = 207 + 16 = 223 u | 1 : 1 |
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