Astrip of copper is immersed in dilute nitric acid
(i) write a balanced equation
cu + 2h + no3 --> cu + no2 +h2o
(ii) what happens to the ph of this solution as the reaction proceeds?

Explanation:

1) When copper strip is immersed in dilute nitric acid it gives copper (II) nitrate ,water and nitrogen mono-oxide.

The balanced equation for the reaction between copper immersed in dilute nitric acid.

2) The pH of the solution was initially acidic and as the reaction proceeds the pH of the solution increases. At the end of the reaction solution becomes neutral. And the neutral solution has pH value of 7.

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.