How Many Electrons Are in Aluminum Spheres?

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Homework Help Overview

The discussion revolves around calculating the number of electrons in two small aluminum spheres, each with a specified mass. The problem involves concepts from chemistry and atomic structure, specifically relating to moles, atomic mass, and the number of electrons in aluminum atoms.

Discussion Character

  • Exploratory, Assumption checking

Approaches and Questions Raised

  • The original poster attempts to calculate the number of electrons by converting mass to moles and using the atomic number of aluminum. Some participants question the correctness of the calculations and the method used.

Discussion Status

The discussion is ongoing, with the original poster seeking guidance on their calculations. There is an indication that the right answer is not accessible, and participants are exploring how to properly present their answer.

Contextual Notes

Participants note that the problem is part of a quiz, which may impose restrictions on how answers are submitted or viewed. There is also uncertainty regarding the correctness of the original poster's calculations.

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Two small aluminum spheres, each of mass 0.0250 kilograms, are separated by 80.0 centimeters.

How many electrons does each sphere contain? (The atomic mass of aluminum is 26.982 grams per mole, and its atomic number is 13.)

The attempt at a solution
I said that there are 6.02*10^23 atoms in a mole, and noted that after converting the mass into grams each sphere has .9265 moles. If the Aluminum spheres are uncharged there are 13 electrons per atom. I multiplied all three together to get 7.25*10^24 total electrons, but this comes up as the wrong answer.

Any guidance as to what I'm doing wrong will be highly appreciated, thanks
 
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What's the right answer?
 
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