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monitta
2 years ago
5

What is the number of copper atom in one naira coin which weight is 7.3g a sum of the material is 86%

Chemistry
1 answer:
Step2247 [10]2 years ago
4 0

Answer:

5.9x10²² atoms of Cu are in one naira coin

Explanation:

To solve this question we need to find the mass of Copper. Then, using its molar mass (Cu = 63.546g/mol) we must find the moles of Cu and its atoms using Avogadro's number:

<em>Mass Cu:</em>

7.3g * 86% = 6.278g is the mass of Cu.

<em>Moles Cu:</em>

6.278g * (1mol / 63.546g) = 0.099moles Cu

<em>Atoms Cu:</em>

0.099moles Cu * (6.022x10²³atoms / 1mol) =

<h3>5.9x10²² atoms of Cu are in one naira coin</h3>
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