Question

Закончите уравнения реакций и расставьте коэффициенты P + O2 → Mg + O2 → H2S + O2 → C2H2 + O2 →

Answer 1

Ответ:

4P + 3O2 (недост.)→ P4O6 или 4P + 3O2 (недост.)→ 2P2O3 (Реакция идет в смеси азота и 2-4% кислорода.)

4P + 5O2 (изб.)→ P4O10 или 4P + 5O2 (изб.)→ 2P2O5

2Mg + O2 → 2MgO

2H2S (насыщ.)+ O2 (недост.)→ 2S + 2H2O

2H2S + 3O2 (изб.)→ 2SO2 + 2H2O

2C2H2 + 5O2 → 4CO2 + 2H2O

Объяснение:

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 one by one:

1. P + O2 → MgO

To balance this equation, we need to ensure that the number of phosphorus (P) atoms and oxygen (O) atoms is the same on both sides.

On the left side, we have one phosphorus atom (P) and two oxygen atoms (O2). On the right side, we have one magnesium atom (Mg) and one oxygen atom (O).

To balance the equation, we can place a coefficient of 2 in front of MgO:

2P + 5O2 → 2MgO [[1]]

2. Mg + O2 → MgO

To balance this equation, we need to ensure that the number of magnesium (Mg) atoms and oxygen (O) atoms is the same on both sides.

On the left side, we have one magnesium atom (Mg) and one oxygen atom (O2). On the right side, we have one magnesium atom (Mg) and one oxygen atom (O).

The equation is already balanced:

Mg + O2 → MgO

3. H2S + O2 → SO2 + H2O

To balance this equation, we need to ensure that the number of hydrogen (H), sulfur (S), and oxygen (O) atoms is the same on both sides.

On the left side, we have two hydrogen atoms (H2), one sulfur atom (S), and two oxygen atoms (O2). On the right side, we have two oxygen atoms (O) in SO2 and two hydrogen atoms (H2) in H2O.

To balance the equation, we can place a coefficient of 2 in front of H2O:

2H2S + 3O2 → 2SO2 + 2H2O [[2]]

4. C2H2 + O2 → CO2 + H2O

To balance this equation, we need to ensure that the number of carbon (C), hydrogen (H), and oxygen (O) atoms is the same on both sides.

On the left side, we have two carbon atoms (C2), two hydrogen atoms (H2), and two oxygen atoms (O2). On the right side, we have one carbon atom (C) in CO2 and two hydrogen atoms (H2) in H2O.

To balance the equation, we can place a coefficient of 2 in front of CO2:

2C2H2 + 5O2 → 4CO2 + 2H2O [[3]]

Summary

The balanced chemical equations are:

1. 2P + 5O2 → 2MgO 2. Mg + O2 → MgO 3. 2H2S + 3O2 → 2SO2 + 2H2O 4. 2C2H2 + 5O2 → 4CO2 + 2H2O

Please note that the coefficients in front of the chemical formulas represent the number of molecules or moles needed to balance the equation.