Question

Помогите решить уравнения по химии! Спасибо огромное заранее!))) HNO3 --> H2O+NO2+O2 Ca O+H2O --> Ca (OH)2 KBr+CI2 --> KCI+Br2

Answer 1

1) 4HNO3 = 4NO2 + 2H2O + O2
2) CaO + H2O = Ca(OH)2
3) 2KBr + Cl2 = 2KCl + Br2 

Answer 2

Balancing Chemical Equations

Sure, I can help you balance these chemical equations. Let's start with the first equation:

HNO3 → H2O + NO2 + O2

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

Let's start with the nitrogen (N) atoms. There is one nitrogen atom on the left side and one on the right side, so nitrogen is already balanced.

Next, let's balance the hydrogen (H) atoms. There are three hydrogen atoms on the left side and two on the right side. To balance them, we can place a coefficient of 2 in front of H2O:

HNO3 → 2H2O + NO2 + O2

Now, let's balance the oxygen (O) atoms. There are three oxygen atoms on the left side and four on the right side. To balance them, we can place a coefficient of 5/2 in front of O2:

HNO3 → 2H2O + NO2 + 5/2 O2

However, it is best to avoid using fractional coefficients in balanced chemical equations. To eliminate the fractional coefficient, we can multiply the entire equation by 2:

2HNO3 → 4H2O + 2NO2 + 5O2

Now, let's move on to the second equation:

Ca + O + H2O → Ca(OH)2

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.

Let's start with the calcium (Ca) atoms. There is one calcium atom on the left side and one on the right side, so calcium is already balanced.

Next, let's balance the oxygen (O) atoms. There is one oxygen atom on the left side and two on the right side. To balance them, we can place a coefficient of 2 in front of H2O:

Ca + O + 2H2O → Ca(OH)2

Now, let's balance the hydrogen (H) atoms. There are two hydrogen atoms on the left side and four on the right side. To balance them, we can place a coefficient of 2 in front of H2O:

Ca + O + 4H2O → Ca(OH)2

Finally, let's balance the third equation:

KBr + Cl2 → KCl + Br2

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.

Let's start with the potassium (K) atoms. There is one potassium atom on the left side and one on the right side, so potassium is already balanced.

Next, let's balance the bromine (Br) atoms. There is one bromine atom on the left side and two on the right side. To balance them, we can place a coefficient of 2 in front of KBr:

2KBr + Cl2 → KCl + Br2

Now, let's balance the chlorine (Cl) atoms. There are two chlorine atoms on the left side and one on the right side. To balance them, we can place a coefficient of 2 in front of KCl:

2KBr + Cl2 → 2KCl + Br2

So, the balanced chemical equations are:

1. 2HNO3 → 4H2O + 2NO2 + 5O2 2. Ca + O + 4H2O → Ca(OH)2 3. 2KBr + Cl2 → 2KCl + Br2

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