Question

Закінчити рівняння реакції та розставити коефіцієнти(Сума атомів кожного елемента до реакції повинна дорівнювати сумі атомів кожного елемента після реакції 1) CH4 + O2 →2) AI +O2 →3) Li +O2 →​

Answer 1

Ответ:

1)CH4 + 2O2 =2H2O+CO2

2)4AI +3O2=2Al2O3

3) 4Li +O2=2Li2O

Answer 2

Balancing Chemical Equations

To balance the given chemical equations, we need to ensure that the number of atoms of each element is the same on both sides of the equation. Let's balance each equation step by step:

1. CH4 + O2 → AI2O3

To balance the equation CH4 + O2 → AI2O3, we need to ensure that the number of atoms of each element is the same on both sides.

Balanced equation: CH4 + 2O2 → AI2O3

Explanation: - On the left side, we have 1 carbon (C) atom and 4 hydrogen (H) atoms in CH4. - On the right side, we have 2 oxygen (O) atoms in O2 and 2 aluminum (AI) atoms in AI2O3.

By adding a coefficient of 2 in front of O2, we balance the equation.

2. AI + O2 → AI2O3

To balance the equation AI + O2 → AI2O3, we need to ensure that the number of atoms of each element is the same on both sides.

Balanced equation: 4AI + 3O2 → 2AI2O3

Explanation: - On the left side, we have 4 aluminum (AI) atoms. - On the right side, we have 3 oxygen (O) atoms in O2 and 2 aluminum (AI) atoms in AI2O3.

By adding a coefficient of 4 in front of AI and a coefficient of 3 in front of O2, we balance the equation.

3. Li + O2 → Li2O

To balance the equation Li + O2 → Li2O, we need to ensure that the number of atoms of each element is the same on both sides.

Balanced equation: 4Li + O2 → 2Li2O

Explanation: - On the left side, we have 4 lithium (Li) atoms. - On the right side, we have 2 oxygen (O) atoms in Li2O.

By adding a coefficient of 4 in front of Li, we balance the equation.

In summary, the balanced equations are: 1. CH4 + 2O2 → AI2O3 2. 4AI + 3O2 → 2AI2O3 3. 4Li + O2 → 2Li2O

Please note that the coefficients in front of the chemical formulas represent the number of molecules or atoms involved in the reaction.