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One milliliter (1.00 mL) of acid taken from a lead storage battery is pipetted into a flask. Water and phenolphthalein indicator are added, and the solution is titrated with 0.38 M NaOH until a pink color appears; 15.8 mL is required. Find, to within 5%, the number of grams of H2SO4 (formula weight = 98) present in 1 L of the battery acid.
Kinetoscope
Thomas Edison’s peephole viewer, in which short, primitive moving pictures could be seen.
Zoetrope
A motion toy consisting of a bowl-like apparatus with slots for viewers to peer through.
Daguerreotype
An early photographic process developed by Louis Daguerre in the 1830s, producing a silver image on a polished copper plate.
Latham Loop
In early projection systems, a set of sprockets that looped the film stock to keep it from breaking as a result of its own inertia.
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