lagonlon| Mr KCl | = | Ar K + Ar Cl |
| = | 39 + 35 | |
| = | 74 |
| mol KCl | = | gram KCl Mr KCl |
| = | 100 74 | |
| = | 1,35 | |
| jumlah molekul KCl | = | mol KCl x bilangan Avogadro |
| = | 1,35 x 6,02 x 1023 | |
| = | 8,127 x 1023 |
| jumlah atom K | = | jumlah atom K dalam KCl x jumlah molekul KCl |
| = | 1 x 8,127 x 1023 | |
| = | 8,127 x 1023 |
| Jumlah atom K | = | 8,127 x 1023 |
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