4p+ 5o2 -> p4o10
if 0.489 mol of phosphorus burns what mass of oxygen is used? what mass of p4o10 is produced?

If 4 moles of P is used by 5 mole of O2
then0.489 moles will be used by 5/4 × .489 = .611 moles of O2

so .611 moles

so if 4 moles of P is burnt , 1 mole of P4O10 is produced so for .489 moles .489/4=.122 moles !
so mass will be .122× 283.89 = 34.7 grams

so first ans is .611 moles and second is 34.7 grams !

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