Suppose a teaspoon of magnesium filings and a teaspoon of powdered sulfur are placed together in a metal beaker. Would this constitute a mixture or a pure substance? Suppose the magnesium filings and sulfur are heated so that they react with each other, forming magnesium sulfide. Would this still be a “mixture”? Why or why not?

Introductory Chemistry: A Foundation
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Chapter3: Matter
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Problem 26QAP: If the combination of iron filings and sulfur in Question 25 is heated strongly, the iron reacts...
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Suppose a teaspoon of magnesium filings and a teaspoon of powdered sulfur are placed together in a metal beaker. Would this constitute a mixture or a pure substance? Suppose the magnesium filings and sulfur are heated so that they react with each other, forming magnesium sulfide. Would this still be a “mixture”? Why or why not?

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