Find the number of ores from the following which \( \mathrm{P} \) can be concentrated by magneti...

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Find the number of ores from the following which
\( \mathrm{P} \)
can be concentrated by magnetic separation
W
method, \( \mathrm{Fe}_{2} \mathrm{O}_{3}, \mathrm{Fe}_{3} \mathrm{O}_{4}, \mathrm{FeCO}_{3}, \mathrm{FeS}_{2}, \mathrm{CuFeS}_{2} \), \( \mathrm{Cu}_{2} \mathrm{O}, \mathrm{ZnS}, \mathrm{ZnCO}_{3}, \mathrm{ZnO} \).
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