Easy answer. It is D. Only problem was that though the Woodrow Wilson proposed the idea the US never joined therefore no country actually listened to the decisions the LoN made.
H2C2O4(aq) + HPO4^2- --> HC2O4^- + H2PO4-
<span>The conjugate base of a weak acid is the anion which remains when H+ is removed. </span>
<span>H2C2O4 <==> H+ + HC2O4^- </span>
<span>acid ............. .......... conjugate base </span>
<span>H2PO4^- <==> H+ + HPO4^2- </span>
<span>acid ............. .......... conjugate base</span>
We can’t answer the question without the article
Scientists believe that Mashkan-shapir's collapse was caused in part by destruction of the fields by mineral salts. When mineral salts concentrate in the upper levels of the soil, it becomes poisonous for plants. In Mesopotamia, irrigation was essential for crop production.
