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Ratling [72]
2 years ago
7

How many Faradays of electricity are carried by 1.505×10^23 electronsk​

Chemistry
1 answer:
aksik [14]2 years ago
3 0

Mole of electron required by 1.505 *10^{23} mole is 2.5* 10  ^{-1}

  • Faraday law expressed how the  change that is been being produced by a current at an electrode-electrolyte interface is related and  proportional to the quantity of electricity  that is been used.

  • There is one mole of electron required for 1 Faraday of electricity.

  • Avogadro constant is 6.02*10^{23}

  • Mole of electron can be calculated by dividing the number of electron by avogadro's constant.

=\frac{1.505*10^{23} }{6.02*10^{23} }

= 2.5* 10^{-1}  Faraday  of electricity

Therefore, it requires  2.5*10^{-1} Faraday of electricity for the 1.505 *  10^{23}  mole.

Learn more at: brainly.com/question/1640558?referrer=searchResults

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How much heat has been lost when a 78 g piece of copper is placed into a calorimeter and cools from 120°C to
lora16 [44]

The amount of heat lost by the copper is 2402.4 J.

To Calculate the amount of heat lost, we use the formula below.

<h3>Formula:</h3>
  • Q = cm(t₂-t₁)................. Equation 1

<h3>Where:</h3>
  • Q = Amount of heat lost
  • c = specific heat capacity of copper
  • m = mass of copper
  • t₂ = Final temperature
  • t₁ = Initial temperature

From the question,

<h3>Given:</h3>
  • m = 78 g
  • c = 0.385 J/g°C
  • t₂ = 120°C
  • t₁ = 40°C

Substitute these values into equation 1.

  • Q = 78(0.385)(120-40)
  • Q = 2402.4 J

Hence, The heat lost by the copper is 2402.4 J

Learn more about heat here: brainly.com/question/13439286

3 0
2 years ago
In at least 4 complete sentences, describe the similarities and differences between Avogadro's Law and Charles' Law.
viktelen [127]

answer

Avogadro's law states that, at constant temperature and pressure, the volume of a gas is directly proportional to the number of moles present. In other words, equal volumes of gases at the same pressure and temperature contain the same number of molecules - this is true regardless of their physical properties or chemical nature.

This number of molecules is

6.022

⋅

10

23

and is known as Avogadro's number,

N

A

.

Matematically, Avogadro's law can be written like this

V

n

=

c

o

n

s

t

, or, better yet,

V

1

n

1

=

V

2

n

2

.

Avogadro's law, as well as Boyle's law and Charles' law, are special cases of the ideal gas law,

P

V

=

n

R

T

. If temperature and pressure are kept constant, and knowing that

R

is of course constant, then

P

V

=

n

R

T

→

P

V

n

=

R

T

→

V

n

=

R

T

P

=

c

o

n

s

t

, which represents Avogadro's law.

The ideal gas law can also be written to incorporate

N

A

, since the number of moles are actually the number of molecules divided by Avogadro's number

P

V

=

N

N

A

⋅

R

T

, where

N

represents the number of molecules.

7 0
3 years ago
Which indicator is yellow in a solution with a pH of 9.8?
Vlada [557]
It's the Methyl Orange. 
at about 4.4 pH, it changes from red to Yellow, to indicate an acid solution.
This pH indicator is normally used in titration of acids.

Hope this Helps :)
8 0
3 years ago
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Where would you find water on the ph scale?
vladimir2022 [97]

Answer: between 6.5 and 8.5

Explanation:

As shown in my science book it appears in the ph scale

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What are the oxidation numbers of K, Cl, and O in KClO,?
Tatiana [17]

Answer: Oxidation number of chlorine in potassium chlorate...

so, oxidation state of chlorine in potassium chlorate is +1. and yea!!

Explanation: hope this help

4 0
3 years ago
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