Between the tin powder with sulfur, which has a melting point higher​

Beginning in 1894, the  process, which takes advantage of the low melting point of sulfur (112 °C [233.6 °F]), made sulfur of a high purity (up to 99.9 percent pure) available in large quantities and helped establish sulfur as an important basic chemical commodity.

Explanation: I HOPE IT HELP IF NOT I JUST TRIED MY BEST

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answer: how the techniques the author's use accomplish their purposes