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| Pregunta | Respuesta |
| Avogadro's number | 6.02*10 ^ 23 |
| Finding Mole of a substance | mole = mass/M(r) |
| A(r) | M(r)*%age abundance+M(r)*%age abundance / total |
| M(r) | Add the total mass of elements in a compound |
| No. of Particles | moles of Particles * Avogadro's constant |
| Moles of Atoms | e.g: 1 mole: 3.5 atoms 4 moles: x atoms |
| No. of Atoms | 10.5x6.02 x 10^23 |
| Moles of electrons | e.g: 1 SO2 : 32e 3.5 : x |
| No. of electrons | 112 x 6.02x10^23 |
| %age Composition | %age composition = atoms of compounds x A(r) / M(r) of compound x100% |
| Emperical formula | e.g: xenon : oxygen : flourine 131 : 16 : 19 0.075 : 0.075 : 0.3 1 : 1 : 4 = XeOF4 |
| % yield = | amount of product formed / maximum amount of product possible *100% |
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