1. Tardigrade
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  3. Chemistry
  4. The weight of iron which will be converted into its oxide (Fe3O4) by the action of 18 g of steam on it will be (at. wt. of Fe = 56)

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Q. The weight of iron which will be converted into its oxide $ (F{{e}_{3}}{{O}_{4}}) $ by the action of 18 g of steam on it will be (at. wt. of Fe = 56)

CMC MedicalCMC Medical 2007

Solution:

$ 3Fe+4{{H}_{2}}O\xrightarrow{{}}F{{e}_{3}}{{O}_{4}}+4{{H}_{2}} $ $ 3\times 56g\,\,4\times 18g $ $ 4\times 18g\,{{H}_{2}}O\equiv 3\times 56g\,Fe $ $ \therefore $ $ 18g\,{{H}_{2}}O=\frac{3\times 56}{4}=42g $