Suppose a student added naoh solution from the buret drop by drop until reaching the equilibrium point. instead of closing the stopcock, he mistakenly opened it wide but then immediately switched it off. check all the possible effects. too much naoh will flow into the flask. the solution will turn from pink to blue. the moles of naoh will be greater than needed. the computed hcl concentration will be greater than in actuality.

a,c,d

a,c,d

same for the second one

Explanation:

edge 2021

answer: atomic mass was originally used to arrange elements on the periodic table, but is no longer used to organize the modern version.

explanation:

originally atomic mass was used to arrange elements on the periodic table from left to right in a row. each column then shows similar properties of elements of a group.

in modern periodic table, the atoms are arranged in increasing atomic number. as atomic number represents the number of protons in an atom which is unique for every atom.