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1.consider a mineral salt perovskite MgSiO3.If some of the Si atoms are substituted by Al, determine the value x for the resultant non-stoichiometric perovskite compound MgSi(0.95) Al (0.01) 5Ox {*註0.95 0.01 為小寫}
(A)2.9(B)2.95(C)2.975(D)3 ANS(C)
問~
x要怎麼求??
2.The oxidation numbers of P,S and Cl in H2PO2-,H2S and KClO4 are, respectively[95中興]
ANS:(+1+2+7)
問~
S不是應該是-2嗎?
3.P+F2→PFx,若與P 2.982g 參與反應能得12.129g的PFx 問x為多少?(P=31 F=19)[94台聯大]
ANS:5
不知道怎麼算= =
有請高手解惑!!!
謝謝!!> <
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