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Veseljchak [2.6K]
3 years ago
11

4. At what phase of the cell cycle does the genetic material double? BRIANLIST!

Chemistry
2 answers:
dmitriy555 [2]3 years ago
8 0

Nah. Give the guy a brainliest for being nice.

inessss [21]3 years ago
5 0
Give the guy brainliest i dont know so give it to him
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Consider an exceptionally weak acid, HA, with a Ka = 1x10 -20 . You make a 0.1M solution of the salt Na
Vedmedyk [2.9K]

Answer:

pH=13

Explanation:

Hello,

In this case, given the acid, we can suppose a simple dissociation as:

HA\rightleftharpoons H^+ + A^-

Which occurs in aqueous phase, therefore, the law of mass action is written by:

Ka=\frac{[H^+][A^-]}{[HA]}

That in terms of the change x due to the reaction's extent we can write:

1x10^{-20}=\frac{x*x}{0.1M-x}

But we prefer to compute the Kb due to its exceptional weakness:

Kb=\frac{Kw}{Ka}=\frac{1x10^{-14}}{1x10^{-20}}  =1x10^{-6}

Next, the acid dissociation in the presence of the base we have:

Kb=\frac{[OH^-][HA]}{[A^-]}=1x10^{6}=\frac{x*x}{0.1-x}

Whose solution is x=0.0999M which equals the concentration of hydroxyl in the solution, thus we compute the pOH:

pOH=-log([OH^-])=-log(0.0999)=1

Finally, since the maximum scale is 14, we can compute the pH by knowing the pOH:

pH+pOH=14\\\\pH=14-pOH=14-1\\\\pH=13

Regards.

5 0
3 years ago
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Identify the element in C6H12O6 that allows it to be classified as an organic compound.
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Answer:

i dont know lol

Explanation:

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8 questions please please help i will make you barinliest 1. Photosynthesis is an important process that converts light energy i
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A chemical reaction that has a positive δg is best described as _____.
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A chemical reaction that has a positive g is best described as endergonic.
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