The compound butanol has the following structural formula. Which of these is a structural isomer of butanol?

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Chen drew a diagram to compare the ways in which different organisms obtain nitrogen. which label belongs to the area marked z?

Achemistry student weighs out 0.306 g of citric acid (h3c6h5o7), a triprotic acid, into a 250 ml volumetric flask and dilutes to the mark with distilled water. he plans to titrate the acid with 0.1000 m naoh solution. calculate the volume of naoh solution the student will need to add to reach the final equivalence point. be sure your answer has the correct number of significant digits.