Indicate whether each of the following statements about Joseph Priestley’s experiment is an observation or an inference. The candle stayed lit longer because the plant gave off oxygen.
The candle went out when it was placed in a closed jar.
The candle stayed lit longer in closed jar when a plant was present.

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.