How Many Copper Atoms Are in a Cubic Centimeter?

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SUMMARY

The discussion focuses on calculating the number of copper atoms in a cubic centimeter, given the mass of a copper atom at 2.50 x 10-25 kg and the density of copper at 8,920 kg/m3. The correct calculation for part (a) yields approximately 8.49 x 1022 atoms per cm3, which is significantly different from the user's result of 8.72 x 1021 atoms. The discrepancy arises from the need to convert density units from kg/m3 to kg/cm3 for accurate calculations. Additionally, the discussion includes visualizing the cubic centimeter as composed of smaller cubes with a copper atom at the center of each.

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farhana21
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Can someone please help me on this physics question

The mass of a copper atom is 2.50 10-25 kg, and the density of copper is 8 920 kg/m3 .

(a) Determine the number of atoms in 1 cm3 of copper.

(b) Visualize the one cubic centimeter as formed by stacking up identical cubes, with one copper atom at the center of each. Determine the volume of each cube.

(c) Find the edge dimension of each cube, which represents an estimate for the spacing between atoms.

For part (a) i got 8.72 * 10^21 however my answers differs from the correct answer by more than 10%

Please could someone help me on this question.

It's much appreciated

Thanks to anyone and everyone who responds to this (in advance)
 
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For part (a) i got 8.72 * 10^21 however my answers differs from the correct answer by more than 10%
What did you try?
Did you remember to convert the volume to m^3 (or density into kg/cm^3)?
 

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