Question

Приведены 8 разных химических реакций. Уравняйте реакции, расставив коэффициенты H2 + O2 = H2O Zn + CuCl2 = Cu + ZnCl2 NH3 = N2 + H2 Cu + S = CuS AgF + NaCl = AgCl + NaF CaCO3 = CaO + CO2 ↑ CuBr2 + NaOH = Cu(OH)2 + NaBr Fe + H2O = H2↑ + Fe2O3

Answer 1

2Н+О2=2Н2О
ненадо
2NH3=3N2+3H2
ненадо

Answer 2

2H2 и 2H2O
во втором уравнении коэфф не нужны
2NH3 и 3H2
  в 4-5 -6 не нужны
2 NaOH и 2NaBr
2Fe+3H2O= Fe2O3+3H2

Answer 3

Chemical Reactions and Balancing Equations

Here are the given chemical reactions that need to be balanced:

1. H2 + O2 = H2O 2. Zn + CuCl2 = Cu + ZnCl2 3. NH3 = N2 + H2 4. Cu + S = CuS 5. AgF + NaCl = AgCl + NaF 6. CaCO3 = CaO + CO2 7. CuBr2 + NaOH = Cu(OH)2 + NaBr 8. Fe + H2O = H2 + Fe2O3

Let's balance each equation one by one:

1. H2 + O2 = H2O

To balance this equation, we need to ensure that the number of atoms of each element is the same on both sides of the equation.

The balanced equation is: 2H2 + O2 = 2H2O [[1]].

2. Zn + CuCl2 = Cu + ZnCl2

To balance this equation, we need to ensure that the number of atoms of each element is the same on both sides of the equation.

The balanced equation is: Zn + CuCl2 = Cu + ZnCl2 [[2]].

3. NH3 = N2 + H2

To balance this equation, we need to ensure that the number of atoms of each element is the same on both sides of the equation.

The balanced equation is: 4NH3 = N2 + 6H2 [[3]].

4. Cu + S = CuS

To balance this equation, we need to ensure that the number of atoms of each element is the same on both sides of the equation.

The balanced equation is: Cu + S = CuS [[4]].

5. AgF + NaCl = AgCl + NaF

To balance this equation, we need to ensure that the number of atoms of each element is the same on both sides of the equation.

The balanced equation is: AgF + NaCl = AgCl + NaF [[5]].

6. CaCO3 = CaO + CO2

To balance this equation, we need to ensure that the number of atoms of each element is the same on both sides of the equation.

The balanced equation is: CaCO3 = CaO + CO2 [[6]].

7. CuBr2 + NaOH = Cu(OH)2 + NaBr

To balance this equation, we need to ensure that the number of atoms of each element is the same on both sides of the equation.

The balanced equation is: CuBr2 + 2NaOH = Cu(OH)2 + 2NaBr [[7]].

8. Fe + H2O = H2 + Fe2O3

To balance this equation, we need to ensure that the number of atoms of each element is the same on both sides of the equation.

The balanced equation is: 3Fe + 4H2O = 4H2 + Fe2O3 [[8]].

I hope this helps! Let me know if you have any further questions.