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Gunpowder is a mixture of potassium nitrate, sulfur and carbon in the proportion by mass of 6:1:1 (KNO3:S:C). A typical rifle shell contains 3.0g of gunpowder. How many moles of each component are there in our sample of gunpowder?

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divide 3 g by 8.

KNO3: 6/8* 3 grams divide by molmass KNO3

S : 1/8 * 3 grams.
and so on.

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