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Alexandra [31]
3 years ago
11

Which statement below best describes the current model of the atom based on Rutherford’s gold foil experiment?

Chemistry
1 answer:
german3 years ago
8 0

Answer:

where are the statements??

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A solution at 25 degrees Celsius has a pH of 4.48. What is the pOH of this solution?
just olya [345]

Hello :)

I just took the quiz, so let me give you a step-by-step explanation of how I solved the problem. Disregard the 25 degrees, it is not needed to find the answer

pH + pOH = 14

4.48 (4.48 is the given pH in problem) + pOH = 14

4.48-4.48 + pOH = 14-4.48 (subtract 4.48 from 14)

pOH = 9.52 (letter c)

Hope this helped :)

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3 years ago
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What is the specific activity (in Bq/g) if 8.58 mg of an isotope emits 7.4x10⁴ α particles per minute?
Monica [59]

Specific activity is the activity per unit mass of a radionuclide and is a physical property of that radionuclide. Activity is a quantity (for which the SI unit is the becquerel) related to radioactivity, and is defined as the number of radioactive transformations per second that occur in a particular radionuclide.

<h3>How do you find the specific activity of an isotopes?</h3>

  •       Activity = λN.
  •       = (0.693/8 days) x (1/86,400 sec/day) x (3 x 1017 atoms)
  •       = 3 x 1011 atoms/sec I-131.
  •       = 3 x 1011 dps I-131.

<h3>What is the specific activity of Co 60?</h3>

The average specific activity of 60Co in continental aquatic sediments is in the region of 1 Bq. kg-1 dry weight (Eyrolle et al., 2008). Cobalt distribution in the abiotic compartments of continental aquatic systems is characterised by the strong affinity of the element for sediment.

Learn more about specific activity of isotopes here:

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2 years ago
I need help with this science question
soldi70 [24.7K]

Answer: 60 degrees Celsius

Explanation:

8 0
3 years ago
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