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Dima020 [189]
3 years ago
13

For the galvanic cell reaction, expressed below using shorthand notation, what half-reaction occurs at the cathode?

Chemistry
1 answer:
Oxana [17]3 years ago
3 0

Answer:

D

Explanation:

In considering the half cell reactions in electrochemical cells, we consider the standard electrode potential of the two half cells. The more negative electrode potential will be the anode and the less negative electrode potential will be the cathode. The electrode potentials of Ni2+(aq)/Ni(s) is -0.25V while that of Zn2+(aq)/Zn(s) is -0.76.

Hence the selected option is the cathodic half reaction equation

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In order to use the Ideal Gas Constant of 0.0821, what units must be used for volume, pressure, amount, and temperature?
IRINA_888 [86]

Answer:

The value becomes 0.0821 L-atm/K⁻¹-mol⁻¹.

Explanation:

The value of gas constant is 0.0821.

We know that, the ideal gas law is as follows :

PV=nRT\\\\R=\dfrac{PV}{nT}

Where

P is pressure

V is volume

T is temperature

In order to use the Ideal Gas Constant of 0.0821, the units are follows :

Volume = Litre (L)

Pressure = atm

Amount = mol⁻¹

Temperature = K⁻¹

So, the value becomes 0.0821 L-atm/K⁻¹-mol⁻¹.

5 0
3 years ago
What is always a molecule but not always a compound? ("A ___ is always a molecule, but a ___ is not always a compound.") Please
Alecsey [184]

Answer:

"A compound is always a molecule, but a molecule is not always a compound."

Explanation:

All compounds are molecules, but not all molecules are compounds. Hydrogen gas (H2) is a molecule, but not a compound because it is made of only one element. Water (H2O) can be called a molecule or a compound because it is made of hydrogen (H) and oxygen (O) atoms.

5 0
3 years ago
Read 2 more answers
What is redox reaction​
Lady_Fox [76]

A reaction in which one reactant undergoes oxidation whereas the other gets reduced during the course of reaction are termed as oxidation-reduction reactions or redox reactions

4 0
2 years ago
What is the balanced oxidation half-reaction from the redox reaction below?
serious [3.7K]
I believe it to be D.

2*3 = 6 e-  is correct 
6 0
3 years ago
What is the molarity of a solution that contains 0.500 mole of kno3 dissolved in 0.500-liter of solution?
belka [17]

Answer : The molarity of solution is, 1.00 M

Explanation : Given,

Moles of KNO_3 = 0.500 mol

Volume of solution = 0.500 L

Molarity : It is defined as the number of moles of solute present in one liter of volume of solution.

Formula used :

\text{Molarity}=\frac{\text{Moles of }KNO_3}{\text{Volume of solution (in L)}}

Now put all the given values in this formula, we get:

\text{Molarity}=\frac{0.500mol}{0.500L}=1.00mole/L=1.00M

Therefore, the molarity of solution is, 1.00 M

7 0
3 years ago
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