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2 years ago

I NEED HELP PLEASE,THANKS!

Chemistry

1 answer:

Yakvenalex [24]2 years ago

6 0

Answer:

Covalent bonding

Explanation:

In covalent bonding, the electrons are shared to fill the octet rule (8 electrons in valence shell). CCl4 tends to do covalent bonding because the the 4 valence electrons are Carbon are shared with the Chlorine atoms so that each chlorine atom has a full octet and chlorine shares its electrons to fill the octet of carbon.

Also, since carbon and chlorine are both non-metal, non-metal things exhibit covalent bonding thus this is covalent bonding as well. Ionic boding is for metal and non metal pair where electrons are transferrred, in our case, electrons are shared, they are not transferred.

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Let A₀ = the original amount of ⁵⁵Co .

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After three half-lives, the amount remaining is ½ ×(½)²A₀ = (½)³A₀.

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(a) Calculate n

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(b) Calculate A

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A₀ = 1.90/0.178 = 10.7 ng

The original mass of ⁵⁵Co was $\boxed{\text{10.7 ng}}$ .

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