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
AlladinOne [14]
3 years ago
15

PLEASE ANSWER.

Chemistry
1 answer:
QveST [7]3 years ago
3 0
Yet and 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15
You might be interested in
Calculate the equilibrium constant for the reaction: 2 Cr + 3 Pb2+ ----> 3 Pb + 2 Cr3+ at 25oC. Eocell = 0.61 V
sattari [20]

Answer:

The value is  K  =  8*10^{61}

Explanation:

From the question we are told that

    The equation is  2 Cr  +  3Pb^{2+} \to 3Pb + 2Cr^{3+}

     The  temperature is  T = 25^oC =  298 K   [room  \ temperature ]

     The  emf at standard condition is  E^o_{cell}  =  0.61 \  V

Generally at the cathode

      3Pb^{2+}(aq) + 6 e- --> 3Pb(s)

  At the anode

      2Cr^{3+} + 6e^- \to  2Cr

Generally for an  electrochemical reaction, at room temperature the Gibbs free energy is mathematically represented as  

       G =  n*  F *  E^o_{cell}

Here  n  is  the no of electron  with value n = 6

       F  is  the Faraday's constant with value 96487 J/V

  =>   G =  6  * 96487 *  0.61

  =>   G = 3.5 *10^{5} \  J

This Gibbs free energy can also be represented mathematically as

       G =  RTlogK

Here  R  is the cell constant with value 8.314J/K

           K is the equilibrium constant

From above

=>  K  =  antilog^{\frac{G}{ RT} }

Generally  antilog =  2.718

=>K  =  2.718^{\frac{3.5 *10^5}{ 8.314* 298} }

=>   K  =  8*10^{61}

       

         

       

         

6 0
3 years ago
Which element will be more reactive - Mg (magnesium) OR Se (Selenium)? *
anygoal [31]

Answer:

magnesium

Explanation:

magnesium is in Group 2, in the periodic table. this means that it has 2 valence electrons. the less valence electrons an element or atom has, the more reactive. Selenium has 6 valence electrons. as a result, Mg is more reactive

5 0
3 years ago
Which of the element pairs are in the same period?
Valentin [98]

Answer:

Caesium and Barium

Explanation:

Once again, if you look at the periodic table, you can see that Caesium and Barium are in the same period (Period 6).

<em>Feel free to mark this as brainliest! :D</em>

4 0
2 years ago
The carbohydrates seen here contains 3 common elements.They are....
Llana [10]
The answer is A),<span>carbon,hydrogen,and oxygen



Hope this helps
</span>
6 0
3 years ago
Read 2 more answers
24. Which Portuguese explorer sailed around Africa and across the Indian Ocean to reach India?
Sliva [168]

Answer:

Vasco de Gama

Explanation:

4 0
3 years ago
Read 2 more answers
Other questions:
  • How many moles of tungsten atoms are in 4.8 x10^25?
    11·1 answer
  • The partial pressures of the gases in a mixture are 0.875 atm O2, 0.0553 atm N2, and 0.00652 atm Ar. What is the total pressure
    7·2 answers
  • How did you use science for your summer vacation? List ideas
    13·1 answer
  • Environmental science is a *
    13·1 answer
  • I think i know the answer but idk..
    9·1 answer
  • Which of the following is classified as a ionic compound
    8·1 answer
  • Regarding acids, bases, and pH, which of these statements is true? Choose one: A. Substances that release protons when they diss
    5·2 answers
  • Which scenario BEST describes how an atom produces light?
    8·1 answer
  • What are the two main phases of cell division
    7·1 answer
  • Write the chemichal formulae of the following compounds.1) Ammonium chloride2) calcium hydroxide​
    10·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!