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Mae 'mol' o niwclysau yn cynnwys 6.02 x 1023 niwclysau. Mae mas un mol o niwclysau (y 'mas molar') tua 0.001kg x rhif mas y niwclews. Defnyddiwch y frasamcan yma ble bynnag mae'r cwestiwn ddim yn rhoi y mas molar yn benodol.
Cysonyn dadfelilo(s-1) | Actifedd (Bq) | Nifer o niwclysau | Mas y sampl(kg) | Mas Molar (kg) |
---|---|---|---|---|
isotop sefydlog | 2.4 x 10-4 | 0.012 | ||
0.0138 | 230 | 0.085 | ||
3.42 x 10-11 | 5600 | 0.239 | ||
1.83 x 10-9 | 3.0 x 10-5 | 0.003 |
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