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3 years ago

Electricity is best described as:

Chemistry

2 answers:

bezimeni [28]3 years ago

5 0

D) The movement of electrons between atoms

Sladkaya [172]3 years ago

4 0

Answer:

the stuff that comes out of your wall outlets B

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A Cu/Cu2 concentration cell has a voltage of 0.22 V at 25 o C. The concentration of Cu2 in one of the half-cells is 1.5 x 10-3 M

Olin [163]

Answer:

The concentration is $[Cu^{2+}]_a = 10^{-10.269}$

Explanation:

From the question we are told that

The voltage of the cell is $E = 0.22 \ V$

Generally the reaction at the cathode is

$Cu^{2+} _{(aq)} + 2e^{-} \to Cu_{s}$ the half cell voltage is V_c = 0.337 V

Generally the reaction at the anode is

$Cu _{(s)} \to Cu^{2+} _{(aq)} + 2e^{-}$ the half cell voltage is V_a = -0.337 V

Gnerally the reaction of the cell is

$Cu_{(s)} + Cu^{2+} _{(aq)} \to Cu^{2+}_{(aq)} + Cu_{(s)}$

At initial the voltage is V = 0 V

Generally the voltage of the cell at 25°C is

$E = V - \frac{0.0591}{n} log \frac{[Cu^{2+}] _a}{[Cu^{2+}]_c}$

Here n is number of of electron and it is 2

So from the question we are told that one cell has a concentration 1.5 x 10-3 M

Let assume it is $[Cu^{2+}]_c$

$0.22= 0 - \frac{0.0591}{2} log \frac{[Cu^{2+}] _a}{ 1.5 * 10^{-3} }$

=> $-7.445 = log \frac{[Cu^{2+}] _a}{ 1.5 * 10^{-3} }$

=> $-7.445 = log [Cu^{2+}_a] - log [1.5*10^{-3}]$

=> $-7.445 + log [1.5*10^{-3} = log [Cu^{2+}_a]$

=> $-7.445 - 2.824 = log [Cu^{2+}_a]$

Taking the antilog

=> $[Cu^{2+}]_a = 10^{-10.269}$

=> $[Cu^{2+}]_a = 5.38 *10^{-11} \ M$

4 0

3 years ago

Pls help A student studies the effect of an object's height on its amount of gravitational energy. This graph summarizes the dat

Sergeu [11.5K]

Answer:

B, as height increases gravitational energy increases

8 0

3 years ago

What specifically determines how much energy is available in a molecular

HACTEHA [7]

C The number and types of bonds within the molecule.

Explanation:

In a molecule, the number and types of bonds present determines the amount of available energy therein.

When bonds are broken or formed, energy is usually released.

Elements combine with one another in order to attain stability in this state.
Through this process, they form bonds by attraction.
Where atoms exchange their valence electrons by losing or gaining it, electrovalent bonds form.
In covalent molecules, electrons are usually shared between atoms.
An attraction result from this type of interaction.
The bond formed stores energy in the process.
When bonds are broken, energy is usually released. The energy accrues when the bond was being formed.
In molecules, we have covalent bond.

Learn more:

Bond brainly.com/question/7213980

Covalent bonds brainly.com/question/5258547

#learnwithBrainly

4 0

4 years ago

What type of reaction is shown below c10H8+12O2 10co2+4H2O

MakcuM [25]

Answer:

Explanation:

Combustion. Have fun with that.