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frutty [35]
3 years ago
15

What atom has the largest atomic radius barium calcium magnesium radium

Chemistry
1 answer:
iogann1982 [59]3 years ago
6 0

Answer:

Radium

Explanation:

It has the highest atomic number so it would have more shells, making it larger than the others.

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

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Why must all chemical equations be balanced?
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