單項選擇題樣品中被測組分是MgO(MMgO=40.31g/mol),稱量形式是Mg2P2O7(MMg2P2O7=222.55g/mol),則換算因數(shù)f值是()

A.0.72
B.0.36
C.0.3623
D.0.1811


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