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prisoha [69]
3 years ago
14

Which statement best describes a solution? A). a mixture consisting of minute particles suspended in a medium that start moving

about as soon as the mixing process stops. B). a mixture consisting of larger particles suspended in a medium that start settling down as soon as the mixing process stops. C). a mixture having a uniform composition where the components can't be seen separately and all components are in the same state. D). a mixture having a uniform composition but the components can be seen separately and all components are in a different state.
Chemistry
1 answer:
makvit [3.9K]3 years ago
3 0
The statement that best describes a solution is the option C: a mixture having a uniform composition where the components cannot be seen separately and all components are in the same state.<span> That is exactly what a solution is: a homogeneous mixture, the composition is uniform, but it can vary from one solution to other. The components must be in the safe phase, but it can be any phase: solid, liquid or gas. The most classical and clear example is the salt solution, NaCl. When you dissolve a spoon of NaCl in water you will not be able to distinguish nor separating the solute from the solvent, and the mixture will have uniform composition.</span>
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<h3>Answer:</h3>

2000 atoms

<h3>Explanation:</h3>

We are given the following;

Initial number of atoms of radium-226 as 8000 atoms

Time taken for the decay 3200 years

We are required to determine the number of atoms that will remain after 3200 years.

We need to know the half life of Radium

  • Half life is the time taken by a radio active material to decay by half of its initial amount.
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Remaining amount = Original amount × 0.5^n

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n = 3200 years ÷ 1600 years

 = 2

Therefore;

Remaining amount = 8000 atoms × 0.5^2

                                = 8000 × 0.25

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Thus, the number of radium-226 that will remain after 3200 years is 2000 atoms.

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