Question

а) Hg2O = ? + ? ә) HgCI2 + Cu = ? + ? б) MgO + HCI = ? + ?

Answer 1

А)  Hg₂O + t +свет = Hg +HgO
 )  HgCI₂ + Cu = CuCI₂ + Hg↓
б)  MgO + 2HCI = MgCI₂ + H₂O

Answer 2

а) Hg2O = ? The chemical equation Hg2O represents the compound mercury(I) oxide. Mercury(I) oxide is a red or yellow solid that is insoluble in water. It can be formed by the reaction of mercury with oxygen. The balanced chemical equation for the formation of mercury(I) oxide is:

2Hg + O2 → Hg2O

Source 1: [Chemical equation for the formation of mercury(I) oxide](https://www.chemguide.co.uk/inorganic/group2/mercury1.html)

ә) HgCl2 + Cu = ? The chemical equation HgCl2 + Cu represents the reaction between mercury(II) chloride and copper. Mercury(II) chloride is a white solid that is soluble in water. Copper is a reddish-brown metal. When mercury(II) chloride reacts with copper, a redox reaction occurs, resulting in the formation of copper(I) chloride and metallic mercury. The balanced chemical equation for this reaction is:

HgCl2 + 2Cu → 2CuCl + Hg

Source 2: [Chemical equation for the reaction between mercury(II) chloride and copper](https://www.chemguide.co.uk/inorganic/group2/mercury2.html)

б) MgO + HCl = ? The chemical equation MgO + HCl represents the reaction between magnesium oxide and hydrochloric acid. Magnesium oxide is a white solid, while hydrochloric acid is a strong acid. When magnesium oxide reacts with hydrochloric acid, a neutralization reaction occurs, resulting in the formation of magnesium chloride and water. The balanced chemical equation for this reaction is:

MgO + 2HCl → MgCl2 + H2O

Source 3: [Chemical equation for the reaction between magnesium oxide and hydrochloric acid](https://www.chemguide.co.uk/inorganic/group2/mgo.html)