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प्रश्न
Write the chemical formula of the following compound in a step-by-step manner –
Iron [III] sulphur
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उत्तर
Write the formula of
| Iron [III] sulphur | Symbol | Valency |
| Iron | \[\ce{Fe}\] | \[\ce{3^{+}}\] |
| sulphur | \[\ce{S}\] | \[\ce{2^{-}}\] |
Step I – Write each symbol with its valency.
Positive ion is written first
\[\ce{Fe}^{3+}\] \[\ce{S}^{2-}\]
Step II – Interchange the valencies ignoring (+) and (−) signs.
The Formula is \[\ce{Fe2S3}\]
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