Hematite Is the Mineral Form of Iron(III) Oxide

question 149

Multiple Choice

Hematite is the mineral form of iron(III) oxide. Calculate the number of iron ions in 20.0 kg of pure hematite.

• A) 1.51 × 10²⁶
• B) 7.54 × 10²⁵
• C) 3.77 × 10¹⁷
• D) 6.63 × 10^-27
• E) 9.62 × 10²¹

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