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3 years ago

An ion has a net charge of 3+. If this ion has 8 protons, how many electrons does it have?

Chemistry

1 answer:

Musya8 [376]3 years ago

8 0

Answer: B. 5

Explanation: A neutral atom has equal number of electrons and protons.

Whenever a neutral atom loses electron it acquires a positive charge. Thus in order to acquire 3+ charge, it must lose three electrons. Thus the number of protons exceeds the number of electrons.

Thus the number of electrons left will be (8-3) = 5 electrons.

If an atom gains electrons, it acquires a negative charge and the number of electrons exceeds the number of protons.

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What structures do both plant cells and animal cells contain?

JulsSmile [24]

A. Nuclei and Mitochondria

This is the answer

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3 years ago

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Neon is an inert gas and has the atomic number of 10. Which of the following correctly depicts its electron configuration? 1s22d

weeeeeb [17]

I think the answer is 1s²2s²2p⁶. Since neon has an atomic number of 10, we know that it needs to have 10 electrons and since it is in the second row it cannot have any d electrons which makes the first option incorrect. The second option is incorrect because the 2s⁴ can't exist since s orbitals can only hold 2 electrons. The fourth option cannot be right because it again neon cannot have d electrons due to it being in the second row.

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3 years ago

Using the following data, determine the standard cell potential E^o cell for the electrochemical cell constructed using the foll

Nana76 [90]

Answer: C) 0.637 V

Explanation:

The balanced redox reaction is:

$Zn(s)+Pb^{2+}(aq)\rightarrow Zn^{2+}(aq)+Pb(s)$

Here Zn undergoes oxidation by loss of electrons, thus act as anode. Lead undergoes reduction by gain of electrons and thus act as cathode.

$E^0=E^0_{cathode}- E^0_{anode}$

Where both $E^0$ are standard reduction potentials.

$Zn^{2+}(aq)+2e^-\rightarrow Zn(s)$ = -0.763

$Pb^{2+}(aq)+2e^-\rightarrow Pb(s)$ = -0.126

$E^0_{[Zn^{2+}/Zn]}=-0.763V$

$E^0_{[Pb^{2+}/Pb]}=-0.126V$

$E^0=E^0_{[Pb^{2+}/Pb]}- E^0_{[Zn^{2+}/Zn]}$

$E^0=-0.126-(-0.763V)=0.637V$

The standard emf of a cell is 0.637 V

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3 years ago

Salt dissolves easiest in

denis-greek [22]

I think it's just water right..?

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3 years ago

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- Ibrahim and Emmanuel have been investigating the amount of copper sulfate that

nignag [31]

The boys can arrive at the conclusion that as temperature increases, a greater mass of copper sulfate is dissolved in water.

<h3>What is an experiment?</h3>

An experiment is a scientific investigation that seeks to obtain cause and effect relationships. There must be a dependent and an independent variable in every experiment.

The average of the temperature readings is; 20 + 30 + 40 + 50 + 60 + 70 + 80/7 = 50

They used an interval of 10 degrees for the temperature readings. The boys should have kept the heating time the same. The independent variable in this experiment is the temperature. The boys can arrive at the conclusion that as temperature increases, a greater mass of copper sulfate is dissolved in water.

Learn more about dependent and independent variables: brainly.com/question/967776

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2 years ago