Question

Розв'яжіть 1. Hg → Hg + O2; 2. Zn + H₂SO4 → ZnSO4+H₂; 3. Na₂S + Pb(NO3)2 → PbS+ NaNO3 4. Ca+O2→ CaO; 5. Na + H₂O → NaOH + H₂;​

Answer 1

Ответ:

Объяснение:

1) 2 HgO → 2 Hg + O₂

2) Zn + H₂SO₄ → ZnSO₄ + H₂

3)  Na₂S + Pb(NO₃)₂ → PbS + 2NaNO₃

4) 2Ca + O₂ → 2CaO

5)2Na + 2H₂O → 2NaOH + H₂

Answer 2

1. Hg → Hg + O₂: This equation is already balanced. It represents the decomposition of mercury (Hg) into its elements, mercury vapor (Hg) and oxygen gas (O₂).

2. Zn + H₂SO₄ → ZnSO₄ + H₂: To balance this equation, we need to ensure that the number of atoms on both sides of the equation is equal. Zn + H₂SO₄ → ZnSO₄ + H₂ To balance the sulfur (S) atoms, we need to place a coefficient of 1/2 in front of ZnSO₄. Zn + H₂SO₄ → ZnSO₄ + H₂ Now the equation is balanced: Zn + H₂SO₄ → ZnSO₄ + H₂

3. Na₂S + Pb(NO₃)₂ → PbS + 2NaNO₃: To balance this equation, we need to ensure that the number of atoms on both sides of the equation is equal. Na₂S + Pb(NO₃)₂ → PbS + 2NaNO₃ Now the equation is balanced: Na₂S + Pb(NO₃)₂ → PbS + 2NaNO₃

4. Ca + O₂ → CaO: To balance this equation, we need to ensure that the number of atoms on both sides of the equation is equal. Ca + O₂ → CaO Now the equation is balanced: 2Ca + O₂ → 2CaO

5. Na + H₂O → NaOH + H₂: To balance this equation, we need to ensure that the number of atoms on both sides of the equation is equal. Na + H₂O → NaOH + H₂ Now the equation is balanced: 2Na + 2H₂O → 2NaOH + H₂