Engage your students with a mystery-based performance assessment that builds real lab skills—without the need for Bunsen burners or fancy equipment!This NGSS-aligned chemistry lab guides students through determining the empirical formula of a hydrate using mass data and mole ratios. With just Epsom salt or Borax, foil, and a hot plate, students apply core mole concepts in a safe, accessible, and engaging format. Students complete: Careful mass measurements before and after heating Molar con