Consider the reaction below. 21(aq)+C12(9) -
->2014(aq)+12(aq)
Which half reaction correctly describes the reduction that is taking place?
O Cl2(g) +2e - →2014 (aq)
O Cl2(g) +2 —>2014 (aq)
O2(aq) —>2(aq)+ 2e
O 2 (aq) — 12(aq)+e

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.

How many neutrons does an element have if its atomic number is 50 and its mass number is 166

If 22.5 of nitrogen at 748 mm hg are compressed to 725 mm hg at constant temperature. what is the new volume?