将m g含氧化铁、氧化铜或氧化亚铁的样品投入到2L物质的量浓度为1mol

m g含氧化铁、氧化铜或氧化亚铁的样品投入到2L物质的量浓度为1mol/L盐酸中恰好完全反应,若向等质量的该样品中通入足量的氢气并加热,充分反应后所得金属的质量是   

  A(m16)g             B(m+16)g        C(m32)g           D16g

答案

A

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