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MariettaO [177]
3 years ago
7

What must happen before a body cell can begin mitotic cell division

Chemistry
1 answer:
bixtya [17]3 years ago
5 0

Prophase is the first stage of Mitosis and also the beginning stage in which the cell prepares itself to begin to other stages of Mitosis.

Hope this helps!!!

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How many grams of NaBr are in 1.69 moles of NaBr?
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opposite

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A radioactive isotope of potassium (k) has a half-life of 20 minutes. if a 43 gram sample of this isotope is allowed to decay fo
Ksenya-84 [330]

Hello!

The half-life is the time of half-disintegration, it is the time in which half of the atoms of an isotope disintegrate.

We have the following data:

mo (initial mass) = 43 g

m (final mass after time T) = ? (in g)

x (number of periods elapsed) = ?

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Let's find the number of periods elapsed (x), let us see:

T = x*P

80 = x*20

80 = 20\:x

20\:x = 80

x = \dfrac{80}{20}

\boxed{x = 4}

Now, let's find the final mass (m) of this isotope after the elapsed time, let's see:

m =  \dfrac{m_o}{2^x}

m =  \dfrac{43}{2^{4}}

m = \dfrac{43}{16}

\boxed{\boxed{m = 2.6875\:g}}\end{array}}\qquad\checkmark

I Hope this helps, greetings ... DexteR! =)

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4 years ago
The force of a gas's outward push divided by the area of the walls of the container is the gas's
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Read 2 more answers
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