Organic compounds have which characteristics? (thinking some might be checked more than once)

This image is an example of a(n) a) atom. b) compound. c) mixture. d) molecule.

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.

The number at the end of an isotope’s name is the number.