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Concentration Terms

31 g of phosp...

Question

31 g of phosphorus (P4) and 32g of oxygen (O2) are completely converted into P4O6 and P4O10 respectively, then moles of P4O6 and P4O10 formed respectively will be
1) 1/8,1/8
2) 1/16,3/16
3) 3/16,1/16
4) 5/32,3/32

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Solution

It is based on limiting reagent
here 2P4 + 8O2 gives P4O6+ P4O10
so phosphorous having 31g and oxygen having 32g
so P4 is the limiting reagent
so ignoring oxygen
2P4----- gives P4O6
so 2x124 gives 1220
so 31 gives 152.5
so the answer is 152.5

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