8. Read the text and answer the questions: oxides, one of them very poisonous. The other is readily soluble in water and forms a weak
The chemical element X forms several simple substances (allotropic forms). It has 2
oxoacid.
1) which is the element X?
2)Write the names of its allotropic forms.
3)Write the formulas of the oxides and determine the oxidation state of the element X in
each of these two oxides.
4)Represent by an equation the formation of the oxoacid.
5)Calculate how many grams are 2 mol of the element X.