Question

Дано уравнение реакции Аl + O2->Al2O3. Сумма коэффициентов в нём равна: а) 4 б) 6 в)8 г)9. ОБЪЯСНИТЕ ПОЖАЛУЙСТА КАК ЭТО РЕШАТЬ И ДЕЛАТЬ!!!!!!!!!!​

Answer 1

Ответ:

Г

Объяснение:

4Al+ 3O2= 2Al2O3

Сумма коэффициентов 4+3+2=9

Answer 2

Balancing the Chemical Equation

To balance the chemical equation Al + O2 -> Al2O3, we need to ensure that the number of atoms of each element is the same on both sides of the equation. Here's how to solve it step by step:

1. Count the Atoms on Each Side: - On the left side, we have 1 Al and 2 O atoms. - On the right side, we have 2 Al and 3 O atoms.

2. Balance the Metals: - To balance the Al atoms, we can put a coefficient of 2 in front of Al on the left side, making it 2 Al.

3. Balance the Non-Metals: - Now, we have 2 Al and 3 O on the left side, and 2 Al and 3 O on the right side. However, we need 6 O atoms on the left side to match the 3 O atoms on the right side.

4. Final Balanced Equation: - The balanced equation is: 4 Al + 3 O2 -> 2 Al2O3.

Conclusion

The sum of the coefficients in the balanced chemical equation Al + O2 -> Al2O3 is 9, which corresponds to option г) 9. This is obtained by balancing the number of atoms of each element on both sides of the equation.