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Description
Grades 9-12. Set against the backdrop of an arson investigation, this guided investigation lets students determine the molecular mass of 2 unknown liquids and identify which is the accelerant from a list of molecular weights. Students use the Dumas method and the ideal gas law to determine the molecular mass of the unknowns.
Grades 9-12. Set against the backdrop of an arson investigation, this guided investigation lets students determine the molecular mass of 2 unknown liquids and identify which is the accelerant from a list of molecular weights. Students use the Dumas method and the ideal gas law to determine the molecular mass of the unknowns. This experiment combines the rigor of a common laboratory technique with the interest of a forensic investigation. Materials are sufficient for 32 students working in pairs.
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