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
Xelga [282]
1 year ago
11

Which element or compound has lost electrons in this oxidation-reduction reaction? 4li 2coo → 2co 2li2o a. coo b. li2o c. li d

. co e. o
Chemistry
1 answer:
Nady [450]1 year ago
7 0

Answer:

       Correct option is C.

Explanation:

Such type of chemical reaction that involves a transfer of electrons between two species is known as oxidation-reduction or redox reaction.

Redox reaction is oxidation number of a molecule, atom, or ion changes by gaining or losing an electron.

For this reaction:

           On reactant side:

Oxidation state of oxygen, cobalt, lithium = -2 ,+2, 0

While on product side of reaction:

Oxidation state of cobalt, oxygen, lithium = 0, -2, +1

Here, oxidation reaction take place because oxidation state of lithium is increased. While the oxidation state of cobalt in reducing, it is gaining electrons and so it undergoes reduction reaction.

So, Option C (Li) is correct.

Learn more about oxidation-reduction reaction:

brainly.com/question/13293425

#SPJ4

You might be interested in
Please I need help with this question.​
7nadin3 [17]

Answer:

c?

Explanation:

7 0
3 years ago
Read 2 more answers
A sample of a pure compound that weighs 59.8 g contains 27.6 g Sb (antimony) and 32.2 g F (fluorine). What is the percent compos
Rama09 [41]

Answer:

53.85%

Explanation:

Data obtained from the question include:

Mass of antimony (Sb) = 27.6g

Mass of Fluorine (F) = 32.2g

Mass of compound = 59.8g

Percentage composition of fluorine (F) =..?

The percentage composition of fluorine can be obtained as follow:

Percentage composition of fluorine = mass of fluorine/mass of compound x 100

Percentage composition of fluorine = 32.2/59.8 x 100

= 53.85%

Therefore, the percentage composition of fluorine in the compound is 53.85%

3 0
3 years ago
ASAP!
Sav [38]

When a radioactive isotope releases an alpha particle, the atomic number of the atom is decreased by four.

So, the correct answer is B.

Hope this helps,

Davinia.

4 0
3 years ago
The amount of energy available to do work after a chemical reaction has occurred is called
sveticcg [70]
Free energy is the answer i hope this helped
8 0
3 years ago
Calculate the standard entropy change for the following reactions at 25°C.
Art [367]

Answer:

(a) ΔSº = 216.10 J/K

(b) ΔSº = - 56.4 J/K

(c) ΔSº = 273.8 J/K

Explanation:

We know the standard entropy change for a given reaction is given by the sum of the entropies of the products minus the entropies of reactants.

First we need to find in an appropiate reference table the standard  molar entropies entropies, and then do the calculations.

(a)        C2H5OH(l)          +        3 O2(g)         ⇒        2 CO2(g)     +    3 H2O(g)

Sº            159.9                          205.2                         213.8                  188.8

(J/Kmol)

ΔSº = [ 2(213.8) + 3(188.8) ]   - [ 159.9  + 3(205.) ]  J/K

ΔSº = 216.10 J/K

(b)         CS2(l)               +         3 O2(g)               ⇒      CO2(g)      +      2 SO2(g)

Sº          151.0                              205.2                         213.8                 248.2

(J/Kmol)

ΔSº  = [ 213.8 + 2(248.2) ] - [ 151.0 + 3(205.2) ] J/K = - 56.4 J/K

(c)        2 C6H6(l)           +        15 O2(g)                     12 CO2(g)     +     6 H2O(g)

Sº           173.3                           205.2                           213.8                    188.8

(J/Kmol)  

ΔSº  = [ 12(213.8) + 6(188.8) ] - [ 2(173.3) + 15( 205.2) ] = 273.8 J/K

Whenever possible we should always verify if our answer makes sense. Note that the signs for the entropy change agree with the change in mol gas. For example in reaction (b) we are going from 4  total mol gas reactants to 3, so the entropy change will be negative.

Note we need to multiply the entropies of each substance by  its coefficient in the balanced chemical equation.

5 0
3 years ago
Other questions:
  • Which of the following is not a catalyst? A. Nickel B. Platinum C. Enzymes D. Phosphorus
    11·2 answers
  • What is the formula equation for the reaction between sulfuric acid and dissolved sodium hydroxide if all products and reactants
    10·1 answer
  • At every depth, soil composition remains the same.<br> O<br> True<br> O False
    15·2 answers
  • Choose the words that make each statement true.
    10·1 answer
  • Which process occurs at the anode in an electrochemical cell?
    14·1 answer
  • Which of the following terms refers to areas of gas on the suns surface that are cooler than the gases around them?
    14·2 answers
  • How many moles are in 48.1 grams of FeF3?
    7·1 answer
  • Someone plz help me :(
    12·1 answer
  • Using the diagram below, which global winds are moving at points 1 and 6?
    11·2 answers
  • How many SO2 molecules are in 1.76 mol of SO2? How many sulfur atoms and oxygen atoms are there?
    6·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!