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
How many moles of hydrogen are needed to completely react with 2 moles of nitrogen
Natali5045456 [20]
Assuming ammonia is the product of this reaction:

N2+3H2--->2NH3

2 mole N2 * (3 mol H2)/(1 mol N2)= 6 mol H2

You would need 6 mol of hydrogen gas to completely react with 2 mol of nitrogen. 
5 0
3 years ago
How many moles of dinitrogen monoxide are present in 9.3 x 10^22 molecules of this compound?
Step2247 [10]

Answer:

<h2>0.15 moles</h2>

Explanation:

To find the number of moles in a substance given it's number of entities we use the formula

n =  \frac{N}{L} \\

where n is the number of moles

N is the number of entities

L is the Avogadro's constant which is

6.02 × 10²³ entities.

From the question we have

n =  \frac{9.3 \times  {10}^{22} }{6.02 \times  {10}^{23} }  \\  = 0.154485...

We have the final answer as

<h3>0.15 moles</h3>

Hope this helps you

8 0
3 years ago
What ionic bond occurs between what particles?
Sladkaya [172]
B positive and negative ion 
4 0
3 years ago
A 0.530 M Ca(OH)2 solution was prepared by dissolving 36.0 grams of Ca(OH)2 in enough water. What is the total volume of the sol
Gekata [30.6K]

Answer:

0.917

Explanation:

3 0
3 years ago
Is soil a pure or impure substance?​
irinina [24]
Impure substance, because pure would be dirt from the earth
5 0
3 years ago
Read 2 more answers
Other questions:
  • 2 molecules of Acetaldehyde can only be made from which of these alkenes?
    5·1 answer
  • 1. Define the term public health.
    6·1 answer
  • If this were a frictionless plane, what would be the ideal mechanical advantage?
    8·1 answer
  • Propane is often used to heat homes. The combustion of propane follows the following reaction: C3H8(g) + 5O2(g)  3CO2 (g) + 4H
    8·1 answer
  • In which type of climate would the soil most likely be well developed and have lots of organic matter?
    5·1 answer
  • Which change happens when a fan is turned on?
    5·1 answer
  • Calculate the energy required to freeze 378 grams of water to ice at 0°c​
    11·2 answers
  • What is the mass of 2.486 * 10^{24} atoms of neon?
    9·1 answer
  • In a compound, chemical energy is _______________ when bonds break.
    9·1 answer
  • W(OH)2 + 2 HCl → WCl2 + 2 H2O
    15·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!