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Eduardwww [97]
3 years ago
11

Salt is added to water. You speed up dissolving by stirring the salt into the water. Then your teacher challenges you to separat

e the salt from the water. You know that the salt and water have formed a solution and that the salt is distributed throughout the glass of water. What would be the BEST way to separate the salt and the water?
A) Collect the slat as it floats in the water.
B) Heat the solution to boiling and evaporate off the water.
C) Spin the solution at a high speed to separate out the salt.
D) Pour the solution through filter paper to filter out the salt.
Chemistry
2 answers:
Zigmanuir [339]3 years ago
7 0

The answer is B i'm pretty sure.

Lera25 [3.4K]3 years ago
7 0

the answer would be B). Heat the solution to boiling and evaporate off the water.

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Explanation:

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The half time of C-14 5730 years  

Carbon-14 is a radioactive nucleus. It has a half-life of 5730 years.

All living tissues like plants and animal absorbed carbon-12 along with carbon-14 with same ratio of caebon-14 to carbon-12 in the atmosphere.

Carbon-14 dating is based on the ratio of carbon-14 to carbon-12 in the atmosphere which is relatively constant

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3 years ago
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Fe⁺² + MnO₄⁻ +  H⁺ => Mn⁺² + Fe⁺³ +  H₂O

5(Fe⁺² => Fe⁺³ + 1e⁻)      =>                        5Fe⁺² => 5Fe⁺³ + 5e⁻

<u>MnO₄⁻ + 5e⁻ => Mn⁺²    =>   MnO₄⁻ + 8H⁺ + 5e⁻ => Mn⁺² + 4H₂O</u>

                                      =>  5Fe⁺² + MnO₄⁻ + 8H⁺ => 5Fe⁺³ + Mn⁺² + 4H₂O

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