A0.45-g sample of aspirin is decomposed into its constituent elements and found to contain 0.27 g c, 0.020 g h, and 0.16 g o. calculate the mass percent composition of c, h, and o in aspirin.

(apex) when a cup of water is dropped, as the cup falls, the water in the cup falls out true or false?

What are the similarities of physical and chemical change ?

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.