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The carbon concentration of an iron-carbon alloy for which the fraction of total ferrite is 0.94 is 0.06. Since the fraction of ferrite in the alloy is 94/100, the fraction of carbon must be 6/100 to make a total of 100/100.

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Q: What is the carbon concentration of an iron-carbon alloy for which the fraction of total ferrite is 0.94?
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