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3 years ago

What organ system carries oxygen and food aoround the body for respiration

1 answer:

8 0

<span> mouth, pharynx, esophagus, stomach, liver, pancreas, small intestine, large intestine, nose, trachea, lungs, and the heart xd hope i helped</span>

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What substance is 52.4 % potassium and 47.6 % chlorine?

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Polymer sand is correct

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3 years ago

A generator is not required to generate electrical energy when which of the following energy sources is used?

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think it's C but my gut is telling me A

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If 20 ml of a 0.5 M sodium hydroxide solution is necessary to neutralize 40 ml of an acid solution, what is the concentration of

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Answer: The concentration of the acid is 0.01 moles acid/0.040 L = 0.25 moles/L = 0.25 M

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3 years ago

Chloroform is an excellent solvent for extracting caffeine from water. The distribution coefficient, KD, (Cchloroform/Cwater) fo

Art [367]

The relative volumes of chloroform and water that should be used is 9:10

Concentration of solution in chloroform = $90$ ( moles of chloroform )

Concentration of solution in water = $10$ ( moles of water )

Dissociation constant at $25^oC$ ; $K_D = 10$

$K_D =$ Concentration of solution in chloroform / Concentration of solution in water

Meaning;

$K_D = \frac{\frac{mole\ of\ chloroform}{volume\ of\ chloroform} }{\frac{mole\ of\ water}{volume\ of\ water} }$

Since $90$ mole is present in chloroform and $10$ mole is present in water, Total mole of Caffeine present is $100$

Now, we substitute our given values into the equation

$10 = \frac{\frac{90}{volume\ of\ chloroform} }{\frac{10}{volume\ of\ water} }\\\\10 *\frac{10}{volume\ of\ water} = \frac{90}{volume\ of\ chloroform} \\\\\frac{100}{volume\ of\ water} = \frac{90}{volume\ of\ chloroform}\\\\\frac{volume\ of\ chloroform}{volume\ of\ water} = \frac{90}{100}\\\\ \frac{volume\ of\ chloroform}{volume\ of\ water} = \frac{9}{10}\\\\ \frac{volume\ of\ chloroform}{volume\ of\ water} = 9:10$

Therefore, the relative volumes of chloroform and water that should be used is 9:10

Learn more; brainly.com/question/11060225

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3 years ago

The process by which DNA is copied during the cell cycle

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Cell replication in somatic cells is called mitosis.
Cell replication in gametes (sex cells) is called meiosis.

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