Chemistry
Grade-9
Easy
Question
Calculate the weight of iron which will be converted into oxide by the action of 36g of oxygen.
- 84 g
- 46 g
- 50 g
- 64 g
Hint:
1 mole of iron reacts with 0.75 moles of oxygen.
The correct answer is: 84 g
2Fe + 3/2O2 
Fe2O3
2 moles of iron react with 1.5 mole of oxygen to give one mole iron oxide.
1 mole of iron reacts with 0.75 moles of oxygen.
56g of iron reacts with 24g of oxygen.
Therefore, for 36g of oxygen 84g of iron will be converted to oxide
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