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nordsb [41]
2 years ago
5

When the ph of an aqueous solution is changed from 1 to 2, the concentration of hydronium ions in the solution is.

Chemistry
1 answer:
kiruha [24]2 years ago
7 0

Answer:

decreased by a factor of 10

Explanation:

pH is defined in such a way that;

pH= −log10(H)

Where H represents the concentration of Hydronium or Hydrogen ions

Given that pH is changed from 1 to 2,

By rearranging the above formula , we get 10−pH = H

  • if pH=1,H=10−1=0.1M
  • if pH=2,H=10−2=0.01M

Therefore,  0.1/0.01 = 10 and 0.1 > 0.01

Hence, the concentration of hydronium ions in the solution is decreased by a factor of 10

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A scientist develops a new experiment to test atomic theory. His results do not agree with the theory.
slamgirl [31]

Answer:

When the results of a new experiment to test atomic theory do not agree with the theory, scientist will repeat the experiment to make sure that his results are reliable.

Explanation:

In the scientific context, each new experiment must be performed with precision and following the steps of the scientific method.

An experiment that does not provide reliable data to demonstrate a theory must be reviewed in detail and performed again to confirm the data obtained in the first attempt.

A theory is a postulate that tries to explain a natural phenomenon, but whose argument can be discussed or does not have the acceptance of a law. When the theory is proven and there are no arguments against it, it can be universally accepted and becomes a law.

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3 years ago
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How many atoms are in a sample of 175 g of sodium (Na)?
denis-greek [22]
Stoichiometry! 
You'll have to take the 175g of Na and convert it to moles if you want to turn this amount into atoms. Thus, you will have to divide 175g by the molar mass of Na that can be found on the periodic table, which can be rounded to 22.99g. That should give you 7.61 mols. However, since the question is asking for atoms, you'll have to bring in Avogadro's number of 6.022*10^23.
So by taking the 7.61 mols, you'll have to multiply that by 6.022*10^23 in order to get 4.58*10^24 atoms which is B.

A simplified version of all that ^ is:
175g (6.022*10^23) / 22.99g = 4.58*10^24. 
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azamat

Answer:what is the question

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Answer:

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