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lesantik [10]
3 years ago
14

What word or two-word phrase best describes the shape of the nitrite ( NO2- ) ion?

Chemistry
2 answers:
Olin [163]3 years ago
6 0

I think the answer would be nitrogen

kari74 [83]3 years ago
3 0

Answer : The shape of the nitrite ion will be, bent.

Explanation :  

Formula used :

\text{Number of electrons}=\frac{1}{2}[V+N-C+A]

where,

V = number of valence electrons present in central atom

N = number of monovalent atoms bonded to central atom

C = charge of cation

A = charge of anion

First we have to determine the hybridization of the nitrite ion, NO_2^- molecule.

\text{Number of electrons}=\frac{1}{2}\times [5+1]=3

The number of electrons are 3 that means the hybridization will be sp^2 and the electronic geometry of the molecule will be trigonal planar.

But as there are two atoms around the central nitrogen, the third position will be occupied by lone pair of electrons. The repulsion between lone and bond pair of electrons is more and hence the molecular geometry will be bent.

Hence, the shape of the nitrite ion will be, bent.

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The half-life of radium-226 is 1590 years. if a sample contains 100 mg, how many mg will remain after 1000 years?
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a=64.7mg

Explanation:

Hello,

In this case, we need to remember that for the required time for a radioactive nuclide as radium-226 to decrease to one half its initial amount we are talking about its half-life. Furthermore, the amount of remaining radioactive material as a function of the half-lives is computed as follows:

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Therefore, for an initial amount of 100 mg with a half-life of 1590 years, after 1000 years, we have:

a=100mg(\frac{1}{2} )^{\frac{1000years}{1590years} }\\\\a=64.7mg

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