0.0100mol/L的高锰酸钾标准溶液10mL与10mL的Fe2+溶液恰好完全反应_爱下问搜题

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问题单项选择题

0.0100mol/L的高锰酸钾标准溶液10mL与10mL的Fe²⁺溶液恰好完全反应，则该Fe²⁺溶液的浓度为( )。

A．0.0100mol/L

B．0.0200mol/L

C．0.0400mol/L

D．0.0500mol/L

答案

参考答案：D

选择题

When a pencil is partly in a glass of water, it looks as if it _____. [ ]

A. breaks

B. has broken

C. were broken

D. had been broken

填空题

砂芯的（）正确与否直接影响铸件的质量。