菱铁矿的主要成分是FeCO3。下列有关说法正确的是(   ) A.菱铁矿

菱铁矿的主要成分是FeCO3。下列有关说法正确的是(  

A.菱铁矿是铁的合金                  BFeCO3是含有氧元素的化合物

CFeCO3中铁的化合价为+3             D.菱铁矿中铁元素的质量分数为48.3%

答案

B

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