
Calculate the total positive or negative charge on a copper penny. Given Avogadro number , atomic number of copper and atomic mass of copper
A.
B.
C.
D.
Answer
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Hint:In order to solve this question you have to find the total positive or negative charge on a copper penny. Firstly, you have to calculate the total number of atoms in the given amount of copper.
Complete step by step solution:
It is given in the question that the mass of the copper penny
The atomic number of the copper is also given
And the atomic mass of the copper
We know that the Avogadro number
In this question you have to calculate the total positive or negative charge on a copper penny.
In order to do so, firstly you have to calculate the total number of atoms in of copper, which is given by,
We know that the total number of atoms in of copper
Hence, total number of atoms in of copper
Since, we know one atom of copper contains electrons or protons.
So, atoms contain electrons or protons.
As we also know that the charge on one electron or proton
the total positive or negative charge on a the given amount of copper
So, the total positive or negative charge on a copper penny is approx.
Therefore, the correct option is (C).
Note:Always remember that the Avogadro’s number is defined as the number of units in one mole of any substance. It is the proportionality factor and is related to the number of constituent particles in a sample with the amount of substance in that sample. Also remember that the amount of charge on one electron and proton is the same in magnitude.
Complete step by step solution:
It is given in the question that the mass of the copper penny
The atomic number of the copper is also given
And the atomic mass of the copper
We know that the Avogadro number
In this question you have to calculate the total positive or negative charge on a
In order to do so, firstly you have to calculate the total number of atoms in
We know that the total number of atoms in
Hence, total number of atoms in
Since, we know one atom of copper contains
So,
As we also know that the charge on one electron or proton
the total positive or negative charge on a the given amount of copper
So, the total positive or negative charge on a
Therefore, the correct option is (C).
Note:Always remember that the Avogadro’s number is defined as the number of units in one mole of any substance. It is the proportionality factor and is related to the number of constituent particles in a sample with the amount of substance in that sample. Also remember that the amount of charge on one electron and proton is the same in magnitude.
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