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Yakvenalex [24]
3 years ago
10

Why do chromosomes condemce before cell division ​

Chemistry
1 answer:
Vlad [161]3 years ago
8 0

Answer:This condensation is needed to allow the chromosomes to move along the mitotic spindle without becoming tangled or broken during their distribution to daughter cells. DNA in this highly condensed state can no longer be transcribed, so all RNA synthesis stops during mitosis.

Explanation: This condensation is needed to allow the chromosomes to move along the mitotic spindle without becoming tangled or broken during their distribution to daughter cells. DNA in this highly condensed state can no longer be transcribed, so all RNA synthesis stops during mitosis.

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Chlorine has two naturally occurring isotopes, ³⁵Cl and ³⁷Cl. What is the mass number of each isotope? How many protons, neutron
Arte-miy333 [17]

The mass number of ³⁵Cl and ³⁷Cl is 35 and respectively.

<h3>What is atomic mass? </h3>

Atomic mass is defined as the sum of number of protons and number of neutrons of an element.

Atomic mass is represented by A.

<h3>What is Atomic number?</h3>

Atomic number is defined as the number of electron in an element.

Atomic number is represented by Z.

<h3>What is Isotopes? </h3>

Isotopes are the element which have same atomic number but have different atomic mass.

Number of proton is equal to number of electrons.

Proton is positively charged, electrons are negativity charge while neutrons are neutral in nature.

Proton and neutrons are present in the nucleus of an element. On the other hand, electron revolves around the nucleus.

The atomic number of ³⁵Cl and ³⁷Cl is 17.

Number of protons = Number of electrons = 18.

Neutrons = atomic mass - atomic number

Neutrons of ³⁵Cl = 35-17 = 18

Neutrons of ³⁷Cl= 37- 17= 20

So, they have different atomic mass and number of neutrons.

Thus, we concluded that the mass number of ³⁵Cl and ³⁷Cl is 35 and 37 respectively.

learn more about atomic mass:

brainly.com/question/14250653

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6 0
2 years ago
We kept adding pbi2 into water until no more will dissolve. what is the concentration of lead (ii) iodide in the solution
blsea [12.9K]

PbI(ii) ionization in the solution of PBI(ii) into water is:

<span>PbI</span>₂(solution) <==> Pb₂⁺ + 2I⁻

If the conc. of PbI(ii) in the sol. is xM then the conc. of Lead(ii) will be x M and conc. of iodide will be 2 x M.

Therefore,

<span>Ksp=<span>[Pb</span></span>²⁺][I-]²

Plugging the values:

1.4×10⁻⁸ = x ⋅ (2x)²

1.4×10⁻⁸ = 4x³

x³ = {1.4×10⁻⁸}÷4

x³ = 0.35 x 10⁻⁸

or 

x³ = 3.5 x 10⁻⁹

x = 1.51 x 10⁻³

Hence,

Concentration of iodide ions in the solution:

2x = 3.02 x 10⁻³ 

6 0
3 years ago
It was a rainy day. When the rain had stopped for some time, your mother asked you to spread the clothes in the cloth line. But
blondinia [14]
It seems like the weather made the clothes dry less quickly
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I would like to know the meaning of the electrostatics? if someone knew please tell me
Andreyy89
Electrostatics is <span> a branch of physics that deals with the phenomena and properties of stationary or slow-moving electric charges. :)     Hope this helps                                                   </span>
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The electronegativity value depends upon the:
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Electronegativity is determined by factors like the nuclear charge

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