In attempts to lift ron's spirits, dumbledore asks him a fairly easy question: calculate the mass percent composition of carbon
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To convert weight to moles, we must use the molar weight found on the periodic table. Sulfur's (S) molar weight is 32.06 g/mol. Then we set up an equation and cancel out units:
So now we know that 0.994g of sulfur is equal to 0.031 moles.