Question
An iron bar weighed $664 \mathrm{~g}$. After the bar had been standing in moist air for a month, exactly one-eighth of the iron turned to rust $\left(\mathrm{Fe}_{2} \mathrm{O}_{3}\right) .$ Calculate the final mass of the iron bar and rust.
Step 1
Since one-eighth of the iron turned to rust, we can find the mass of the rusted iron by dividing the initial mass by 8: 664 g / 8 = 83 g Show more…
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