GK
CHEMISTRY
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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A student calculated the % composition of the elements in the compound Pb3(PO4)2 and said that one element represented 16.8%. Which element was this?
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Lead
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Phosphorous
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Oxygen
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None of these
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Explanation:
Detailed explanation-1: -Mass percentage of Pb, P, and O in lead phosphate [Pb3(PO4)2] are 76.57%, 7.64%, and 15.78% respectively.
Detailed explanation-2: -Lead phosphate | Pb3(PO4)2-PubChem.
Detailed explanation-3: -The cation is the lead (II) ion Pb2+ P b 2 + and the anion is the phosphate ion PO3−4 P O 4 3 − . From the subscripts 3 and 2 in the chemical formula Pb3(PO4)2 P b 3 ( P O 4 ) 2, we can tell that the magnitudes of the valences of the main ions are likely 3 and 2.
Detailed explanation-4: -Lead(II) phosphate is an ionic compound with chemical formula Pb3(PO4)2. Lead(II) phosphate is a long-lived electronically neutral reagent chemical.
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