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Vsevolod [243]
4 years ago
6

What is “the international system of units”?

Chemistry
1 answer:
Anastaziya [24]4 years ago
3 0

the metric system is the international standard unit

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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 of these statements is an example of a prediction? A;birds are red, blue, and brown. B;birds are large. C;if you walk near
miss Akunina [59]

Answer:

C

Explanation:

If you walk near them, they will fly away

5 0
3 years ago
Read 2 more answers
Why doesn't light get absorbed
ziro4ka [17]
It isn't a materialistic object.

6 0
3 years ago
Atoms that have lost or gained one or more electrons are called ________.
SVETLANKA909090 [29]
Atoms that have lost or gained one or more electrons are called ions.
3 0
3 years ago
I NEED HELP ASAP!!!!!!!!!!!!!!!!!!!
Hoochie [10]

Answer:

a) 0

Explanation:

Each of the small dots surrounding the C1 represents one electron. These are where electrivity comes from. Since there is the same number of electrons in both atoms, the difference is 0 (because 6 electrons-6electrons= 0).

4 0
2 years ago
Read 2 more answers
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