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Which of the following formulas for a compound containing the Fe2+ ion is incorrect?
Q28: <span class="ql-formula" data-value="5 \sqrt { 605 }
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Q67: Which of the following sets of formulas
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Q90: <span class="ql-formula" data-value="\sqrt { 4 x ^
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Q148: <span class="ql-formula" data-value="\sqrt { 3 } \cdot