What forces were acting on the objects dropped in the air? What force was acting on the objects dropped in the vacuum?

Which statement describes james chadwick’s discovery.

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.

Name a brittle metal , which is used to galvanize iron