Question

how grams of oxygen can be produced from the decomposition of 100g KClO3?

how much iron can be recovered from 25.0g of Fe2O3

how can be produced from 125g Ag2S

Figure the precentage composition of the compound. For instance

percent of Fe in Fe2O3 = 2*atomicmassFe/(2atomicmassFe + 3atomicmass)

Then, you can multiply that decimal percent by the grams of Fe2O3 to get the yield.

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