The molecular mass/formula weight of the compound is 283.88 amu. How many phosphorous atoms ar in a molecule of this compound? Please show all calc involved.
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% P = 43.64
mass p in 100 g compound = 43.64 g
moles P = 43.64 g P x 1 mol P/31.0 g = 1.41 mol P
% O = 56.36
mass O in 100 g compound = 56.36 g
moles O = 56.36 g O x 1 mole O/16.00 g = 3.52 mole
mol O/mol P = 5.52/1.41 = 2.5:1 = 5:2
empirical formula = P2O5: empirical formula weight = 142
MW/EFW = 284/142 = 2. 2(PO5) = P4O10
mass p in 100 g compound = 43.64 g
moles P = 43.64 g P x 1 mol P/31.0 g = 1.41 mol P
% O = 56.36
mass O in 100 g compound = 56.36 g
moles O = 56.36 g O x 1 mole O/16.00 g = 3.52 mole
mol O/mol P = 5.52/1.41 = 2.5:1 = 5:2
empirical formula = P2O5: empirical formula weight = 142
MW/EFW = 284/142 = 2. 2(PO5) = P4O10