What balances charges that may build up as reduction and oxidation occur in a voltaic cell?a.
the salt bridge
c.
the electrolyte solutions
b.
one of the half-cells
d.
the moving electrons

Answers

Answer 1
Answer: I think the correct answer from the choices listed above is option A. It is the salt bridge that balances charges that may build up as reduction and oxidation occur in a voltaic cell. The salt bridge is to maintain charge balance because the electrons are moving from one half cell to the other.
Answer 2
Answer:

Answer: Option (a) is the correct answer.

Explanation:

In a voltaic cell, salt bridge is used for connecting oxidation and reduction half cells.

The main purpose of using salt bridge in a voltaic cell is that it helps in maintaining electrical neutrality in the internal circuit occurring at anode and cathode of the cell.

Without salt bridge in a voltaic cell there will be imbalance of charges as a result solution in anode compartment will become positively charged whereas solution in cathode compartment will become negatively charged.

Thus, we can conclude that the salt bridge balances charges that may build up as reduction and oxidation occur in a voltaic cell.


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Given the equation representing a closed system:N2O4(g) <=> 2NO2(g)Which statement describes this system at equilibrium?
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Answers

Answer: The correct option is (3).

Explanation:

N_2O_4(g)\rightleftharpoons 2NO_2(g)

An equilibrium in a reversible chemical reaction is a state in which concentration of reactants and products do not change with time. At equilibrium the rate of forward reaction is equal to the rate of backward reaction.

So, from the given statements the correct statement describing the given system at equilibrium is statement numbered '3'

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For which of the following equilibria does Keq= [O2]?a. O2(l)<=>O2(g)
b. 2O3(g)<=>3O2(g)
c. 2H2O(l)<=>2H2(g)+ O2(g)
d. 2Hg(s)+ O2(g)<=>2HgO(s)
e. C(s)+ O2(g)<=>CO2(g)

Answers

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Answers

It is a mixture that is uniform in both composition and properties.

Answer:

It is a mixture that is uniform in both composition and properties.

Explanation:

What is the difference between a period and a group on the periodic table

Answers

A period is the colums goi
ng down on the periodic table, and the groups are the rows going across
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Groups are up to down.  These groups have the same number of outer shell electrons.  There are 12 groups.

Label parts of this atom ( nucleus, protons,electrons,
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Answers

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Which two ions have the same electron configuration?A) Na+ and O2- B) Li+ and F- C) Ca2+ and Br- D) Na+ and O3-

Answers

Answer: A) Na+ and O2-

Explanation:

To know the electronic configuration, one has to determine the numbers of electrons present in each atom.

Na+ means a sodium atom that has lost one valence electron. A Sodium atom  initially has 11 electrons, but having lost an electron making it 10 electrons remaining with electron configuration of 1s2 2s2 2p6.

O2- means oxygen atom that has gained two valence electrons. An oxygen atom  initially has 8 electrons, having gained two electrons makes it 10 electrons with electron configuration of 1s2 2s2 2p6. same as Na+

The purpose of gaining or losing electrons is to attain a stable duplet or octet structure.

The  two ions with same electronic configuration are Na^+ and O²^- .

What is electronic configuration?

Electronic configuration is defined as the distribution of electrons of an atom or a molecule in orbitals of an atom or of a molecule.It describes each electron which is moving independently  in it's orbital.

Electrons are able to move from one configuration to another  by either absorption or emission of  a quantum of energy, which is called as a photon.It is useful in understanding the structure  of periodic table.

Considering the pair of sodium cation and oxygen anion the sodium atom with one positive charge has 10 electrons and oxygen anion with two negative charge has 10 electrons .

The elements with same number of electrons are called isoelectronic species.

Learn more about electronic configuration,here:

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