Question

Сума коефіцієнтів яка? K2o+h2o =naoh Al(oh)3=al2o3+h2o Na+h20=naoh+h2 C2h4+02=co2+h20

Answer 1

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Объяснение:

Answer 2

It seems like you have provided a series of chemical reactions. The question "Сума коефіцієнтів яка?" is in Ukrainian and translates to "What is the sum of coefficients?" The sum of coefficients in a balanced chemical equation refers to the sum of the numbers placed in front of the chemical formulas to balance the equation.

Let's balance the provided chemical equations and find the sum of coefficients for each reaction:

1. K2O + H2O → 2KOH
2. Al(OH)3 → Al2O3 + 3H2O
3. 2Na + 2H2O → 2NaOH + H2
4. C2H4 + 3O2 → 2CO2 + 2H2O

Now, let's find the sum of coefficients for each reaction:

1. K2O + H2O → 2KOH: Sum of coefficients = 1 + 1 + 2 = 4
2. Al(OH)3 → Al2O3 + 3H2O: Sum of coefficients = 1 + 3 = 4
3. 2Na + 2H2O → 2NaOH + H2: Sum of coefficients = 2 + 2 + 2 + 1 = 7
4. C2H4 + 3O2 → 2CO2 + 2H2O: Sum of coefficients = 1 + 3 + 2 + 2 + 2 = 10

Therefore, the sum of coefficients for each of the provided reactions is as follows:

1. 4
2. 4
3. 7
4. 10