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
denis23 [38]
2 years ago
11

Plz help!!! This is timed!!!

Chemistry
1 answer:
pogonyaev2 years ago
7 0
58.7 %

Please correct me if I’m wrong. :)
You might be interested in
The SI unit of pressure is the ______________.
steposvetlana [31]

The answer is Pascal

5 0
3 years ago
Read 2 more answers
Explain how changing the concentration The enthalpy change for the reaction, 3CO (g) 2Fe2O3 (s) Imported Asset Fe(s) 3CO2 (g), c
ycow [4]

<u>Answer:</u> For the given equation, only iron has the value of \Delta H_f equal to 0 kJ.

<u>Explanation:</u>

Enthalpy change is defined as the difference in enthalpies of all the product and the reactants each multiplied with their respective number of moles. It is represented as \Delta H^o

The equation used to calculate enthalpy change is of a reaction is:

\Delta H^o_{rxn}=\sum [n\times \Delta H^o_f(product)]-\sum [n\times \Delta H^o_f(reactant)]

For the given chemical reaction:

3CO(g)+2Fe_2O_3(s)\rightarrow Fe(s)+3CO_2(g)

The equation for the enthalpy change of the above reaction is:

\Delta H^o_{rxn}=[(1\times \Delta H^o_f_{(Fe(s))})+(3\times \Delta H^o_f_{(CO_2(g))})]-[(3\times \Delta H^o_f_{(CO(g))})+(2\times \Delta H^o_f_{(Fe_2O_3(s))})]

The enthalpy of formation for the substances present in their elemental state is taken as 0.

Here, iron is present in its elemental state which is solid.

Hence, for the given equation, only iron has the value of \Delta H_f equal to 0 kJ.

7 0
3 years ago
A combustion reaction is one type of what class of reactions?
ivanzaharov [21]
It is a. oxidation-reduction
6 0
3 years ago
In reality, reactants don't have to react in perfect whole-numbers of moles. In a two-reactant synthesis reaction, usually one
Fofino [41]

Answer:

srry i cant help u with this im so confuse like u just put all of it on there how would anybody answer tht!

?!Explanation:

5 0
3 years ago
An example of a homogeneous mixture is 1. oil and vinegar dressing. 2. concrete. 3. a mixture of salt and pepper. 4. salt water
Sidana [21]

A mixture in which composition is constant throughout the mixture is said to be homogeneous mixture.

Now, oil and vinegar dressing is not considered as a homogeneous mixture because composition is not uniform.

Concrete is made up of three components. Thus, composition is not uniform, so it is not a homogeneous mixture.

A mixture of salt and pepper, when salt is mixed in pepper then the mixture is not uniform as white flecks of salt and black flecks of pepper can be seen in the mixture. Thus, it is not a homogeneous mixture.

Salt water is uniform mixture. Thus,  it is a homogeneous mixture.

Thus, salt water is the correct answer.


4 0
4 years ago
Other questions:
  • Easy points!
    8·1 answer
  • Balance the chemical equation by indicating the number of each species in the appropriate blanks. For this exercise, indicate co
    12·1 answer
  • How many valence electrons does an atom of any halogen have?
    7·1 answer
  • 2 mg + 02–&gt; 2Mg0 reaction type?
    14·1 answer
  • A drop of water placed on a smooth, dry surface will form a dome-shaped droplet instead of flowing outward in different directio
    5·2 answers
  • The entropy of an exothermic reaction decreases. This reaction will be spontaneous under which of the following temperatures?
    9·2 answers
  • need help is due tommorow about glacier.the question is this how might this affect the earth contients?
    6·1 answer
  • Define friction in your own words
    10·1 answer
  • What has caused air quality in United States to improve/get better since the 1950s?
    9·2 answers
  • Which structure assist with cell ur respiration?
    8·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!