1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
Valentin [98]
2 years ago
9

Teniendo en cuenta los siguientes fenómenos: ebullición del agua- movimiento de un cuerpo- disolución de sal en agua- combustión

de la leña- oxidación del hierro – evaporación del alcohol- fusión del cobre – descomposición del agua en hidrógeno y oxígeno. Indica cuales se tratan de reacciones químicas. Justifica tu respuesta.
Chemistry
1 answer:
miv72 [106K]2 years ago
3 0

Answer:

Las siguientes son reacciones químicas;

combustión de leña

oxidación del hierro

descomposición del agua en hidrógeno y oxígeno

Explanation:

Una reacción química da como resultado la formación de una (s) sustancia (s) nueva (s), mientras que un cambio físico no conduce a la formación de una sustancia nueva.

Las siguientes son reacciones químicas;

combustión de leña: la combustión de madera implica la oxidación del carbono según la reacción; C (s) + O2 (g) -------> CO2 (g)

oxidación del hierro: La oxidación del hierro conduce a la formación de óxidos de hierro. Como; 2Fe (s) + O2 (g) ----> 2FeO (s)

descomposición del agua en hidrógeno y oxígeno: esta es una reacción química en la que el agua se descompone de la siguiente manera; 2H2O (l) -----> 2H2 (g) + O2 (g)

Todos estos procesos enumerados anteriormente conducen a la formación de nuevas sustancias, por lo tanto, son reacciones químicas.

You might be interested in
1. Complete the following
Marat540 [252]

Answer:

\large \boxed{\text{0.603 mol}}

Explanation:

We must do the conversions

mass of C₆H₁₂O₆ ⟶ moles of C₆H₁₂O₆ ⟶ moles of O₂

We will need a chemical equation with masses and molar masses, so, let's gather all the information in one place.

Mᵣ:        180.16

           C₆H₁₂O₆ + 6O₂ ⟶ 6CO₂ + 6H₂O

m/g:        18.1

(a) Moles of C₆H₁₂O₆

\text{Moles of C$_{6}$H$_{12}$O}_{6} = \text{18.1 g C$_{6}$H$_{12}$O}_{6}\times \dfrac{\text{1 mol C$_{6}$H$_{12}$O}_{6}}{\text{180.16 g C$_{6}$H$_{12}$O}_{6}}\\\\= \text{0.1005 mol C$_{6}$H$_{12}$O}_{6}

b) Moles of O₂

\text{Moles of O}_{2} =\text{0.1005 mol C$_{6}$H$_{12}$O}_{6} \times \dfrac{\text{6 mol O}_{2}}{\text{1 mol C$_{6}$H$_{12}$O}_{6}} = \text{0.603 mol O}_{2}\\\\\text{The reaction requires $\large \boxed{\textbf{0.603 mol}}$ of oxygen}  

3 0
2 years ago
If normal rainwater has a pH of about 6.50, what is the hydrogen ion concentration, [H+]?
IceJOKER [234]

Answer:

.000000316

Explanation:

H+=10^-pH

6 0
3 years ago
Using current genetic engineering techniques can provide potential benefits for parents, including
Black_prince [1.1K]

Answer:

conceiving a child who is a bone marrow match to a living child.

Explanation:

5 0
3 years ago
Read 2 more answers
Speed is defined as the distance an object travels per unit of time. Which TYPE of speed is observed when you look at the speedo
Eduardwww [97]
B.) Instantaneous speed because the speedometer shows how fast you are going at that giving time .
5 0
2 years ago
Read 2 more answers
Explain why the Earth is constantly undergoing change? *
ElenaW [278]

Real quick, I will tell you why i think it does from a scientific point of veiw, but I dont know for sure.

The reason that the Earth goes through so much change on a regular basis is because of Gravity. What Gravity is doing is pulling objects to the Earth that it can reach (Which you probably knew) and so when it does this, it is pulling at the earths surface as well, causing constant change.

I hope this helps you!

4 0
3 years ago
Read 2 more answers
Other questions:
  • Predict the electronegativity of the yet undiscovered element with Z = 119.
    7·1 answer
  • 14 points!!! Pls tell me answer :3
    7·2 answers
  • Which of the following is an example of a physical change? A) grinding coffee beans B) baking a cake C) converting water to hydr
    15·1 answer
  • Can u pls help me with this question ​
    10·2 answers
  • Why would one ball accelerate more than the other when pushed with the same amount of force?
    5·1 answer
  • Aee all sets of political views correct? i need long answer​
    12·1 answer
  • What type of particle has no mass or charge? <br> A) Alpha <br> B) Beta <br> C) Gamma <br> D) Proton
    15·2 answers
  • If i run away is that stealing from my parents?
    6·2 answers
  • What happens to the food dye in hot water?
    5·2 answers
  • The density of a substance is 1.63 grams per milliliter. What is the mass of 0.25 liters of the substance in grams?
    8·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!