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
zysi [14]
3 years ago
10

2C(s) + 2H2(g) → C2H4(g): ΔH = +52.4 kJ/mol Which statement about this reaction is correct?

Chemistry
1 answer:
artcher [175]3 years ago
6 0
<h3><u>Answer;</u></h3>

26.2 kJ of energy are absorbed for every mole of carbon reacted

<h3><u>Explanation;</u></h3>
  • ΔH is the enthalpy change which is given by subtracting the energy of reactants from the energy of products.
  • That is; ΔH = energy of products - energy of reactants
  • <u>In this case, it means that C2H4 has more energy than the the reactants. 52.4 J of energy to be precise, this energy is absorbed during the reaction.</u>
  • <u>However, Two moles of Carbon  require that much energy, thus one mole will require only 26.2 to react. </u>
You might be interested in
How are tectonic plates related to earthquakes and volcanoes?
patriot [66]

Answer

Tectonic plates are parts of the earth's crust. There are cracks in these plates that allow magma to seep through and build-up which creates volcanic eruptions. Volcanos themselves are created by the earth's plates pushing against each other and slowly, over time, rising to create these large raises in the crust. Earthquakes are caused by these plates creating friction against one another until they forcefully overlap or rip apart, hence the shaking effect during an earthquake.

8 0
3 years ago
how many moles of potassium hydroxide are needed to completely react with 1.73 miles of aluminum sulfate according to the follow
Masteriza [31]
<h3><u>Answer; </u></h3>

=10.38  moles KOH  

<h3><u>Explanation</u>;</h3>

The balanced equation.  

6KOH + Al2(SO4)3 --> 3K2SO4 + 2Al(OH)3  

From the equation;

1 mole of aluminum sulfate requires 6 moles of potassium hydroxide.  

Moles of Aluminium sulfate;  1.73 moles

Moles of KOH;

1 mol Al2(SO4)3 : 6 mol KOH = 1.73  mol Al2(SO4)3 : x mol KOH  

Thus; x =  (6 × 1.73)

              <u> =10.38 moles KOH </u>

4 0
3 years ago
Read 2 more answers
An atom in an excited state contains more of what type of energy than the same atom in the ground state? An atom in an excited s
kupik [55]

Answer: An atom in an excited state contains more of kinetic energy than the same atom in the ground state.

Explanation:

Kinetic energy is the energy acquired by an object due to its motion. And, thermal energy is the internal energy of an object arisen because of the kinetic energy present within the molecules of the object.

Potential energy is the energy acquired by an object due to its position.

The total energy present at the center of mass of an object is known as mass-energy.

So, when an atom gets excited then it means it is gaining kinetic energy due to which it moves from its initial position after getting excited.

Thus, we can conclude that an atom in an excited state contains more of kinetic energy than the same atom in the ground state.

8 0
3 years ago
Why is it better to measure the percent change in mass<br> ratherthan just using the change in mass?
never [62]

Answer: The result is presented in proportion which gives a clearer understanding and accurate result.

Explanation: Percentage change in mass is the proportion of the initial mass of a substance changed after sometime. The results is presented as a percentage making it more accurate and can help to give future reference to weight calculations.

Change is Mass is the mass of a substance left after sometime mostly given in grams. It is not as accurate as percentage change in mass. It is generally better to show results in percentage change in mass as it gives a better understanding of what mass of a substance was lost after a given period or after application of energy like Heat or increased temperature.

6 0
3 years ago
PLEASE HELP!!!!!!!
KonstantinChe [14]

Answer: The gas generated by two antacid tablets has a smaller volume.

Explanation:

Since the antiacid is the limiting reagent, we know that the more tablets there are, the more gas there will be.

This means that there will be more gas generated by the four antiacid tablets when compared to the two antiacid tablets, which gives us that the gas generated by the two antiacid tablets has a smaller volume.

6 0
2 years ago
Other questions:
  • Write the concentration equilibrium constant expression for this reaction. 2cui (s) + i2 (aq) → 2cu+2 (aq) + 4i− (aq)
    14·2 answers
  • Complete and balance the following oxidation-reduction reactions, which give the highest possible oxidation state for the
    5·1 answer
  • What is an example of ionic compound?<br><br>A.co2<br>B.Kcl<br>C.H2o<br>D.Co
    12·1 answer
  • Question 8 4 pts What would be the resulting molarity of a solution made by dissolving 31.3 grams of Ca(OH)2 in enough water to
    8·2 answers
  • Are all synthetic products bad?
    5·1 answer
  • A chimical reaction is supposed to produce 1.44 g of product X. When the reaction is carried out, only 1.31 g of product X are f
    11·1 answer
  • How many grams are in 2.30 x 10^24 atoms in silver
    10·1 answer
  • How does the light source readout differ from the x-ray readout in the gizmo??
    15·1 answer
  • En relación a la escala de ph se puede decir lo siguiente: I. Mientras más cerca del 8 la sustancia es más básica II. El papel t
    14·1 answer
  • What are the alkaline earth metals?
    9·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!