The way living things are organized can be represented on a chart. A portion of the organization chart is shown below: A box labeled Cells has an arrow pointing right towards another box labeled X. The box labeled X has an arrow pointing right towards another box labeled Organs. What best represents X? (1 point) a Atoms b Molecules c Organisms d Tissues

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.