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3 years ago

An electric circuit can have no current when a switch is ________

Chemistry

2 answers:

Bond [772]3 years ago

7 0

An electric circuit can have no current when a switch is open. that is the correct answer.

klasskru [66]3 years ago

3 0

<h3><u>Answer;</u></h3>

Open

An electric circuit can have no current when a switch is <u>open</u>.

<h3><u>Explanation;</u></h3>

<em><u>An electric circuit is a path in which electrons from a voltage or current source flow. </u></em>
Electric switches are used to connect and break the flow of connectivity or flow of electrons in a circuit. A switch makes it easy to open or close an electrical circuit, turning the flow of electricity on or off.
<em><u>When a switch is closed the circuit is closed and thus the flow of current is on while when the switch is open, the circuit is open, and therefore there will be no flow of current in the circuit.</u></em>

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Answer : The correct option is, (C) 6

Explanation :

Oxidation-reduction reaction : It is a reaction in which oxidation and reduction reaction occur simultaneously.

Oxidation reaction : It is the reaction in which a substance looses its electrons. In this oxidation state increases.

Reduction reaction : It is the reaction in which a substance gains electrons. In this oxidation state decreases.

The given unbalanced chemical reaction is,

$Fe(s)+I^-(aq)\rightarrow I_2(s)+Fe^{3+}(aq)$

Half reactions of oxidation and reduction are :

Oxidation : $Fe(s)\rightarrow Fe^{3+}+3e^-$ ......(1)

Reduction : $2I^-(aq)+2e^-\rightarrow I_2$ .......(2)

In order to balance the electrons, we multiply equation 1 by 2 and equation 2 by 3, we get:

Oxidation : $2Fe(s)\rightarrow 2Fe^{3+}+6e^-$ ......(1)

Reduction : $6I^-(aq)+6e^-\rightarrow 3I_2$ .......(2)

The overall balanced chemical reaction will be:

$2Fe(s)+6I^-(aq)\rightarrow 3I_2(s)+2Fe^{3+}(aq)$

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3 years ago

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<span>The answer is - 6.30 * 10^3 kJ/mol

</span>

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4 years ago

Calculate the atomic mass of silver if 13 out of 25 atoms are silver-107 and 12 out of 25 are silver-109

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From,

RAM=element×its relative abudance/total abudance

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