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Question:

What was the percent iron in the sample of ore?

A 24.5 g of iron ore is treated as follows. Theiron in the sample is all converted by a seriesof chemical reactions to Fe2O3. The mass ofFe2O3 is measured to be 13 grams. What wasthe percent iron in the sample of ore?Answer in units of %

Answer:

as your brakes wear the fluid level will go down that is normal but for selling purposes just top it up when new brakes are next fitted it will be removed
Fe2O3 159.7g/mole 111.7gFe / 159.7g x 100% %Fe 70% 13g Fe2O3 is produced, 13g x 0.7 9.1g Fe in 13g Fe2O3 9.1g / 24.5g sample x 100% 37.1% in the ore
pads r wearing down inspect brakes.maybe just top off fluid

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