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Kobotan [32]
3 years ago
7

A student has a hamburger, french fries, and soda for lunch. These foods must be changed by the digestive system in order to be

used by the body. Which of the following describes the processes that occur during digestion as food enters the mouth and passes through the other organs of the digestive system?
Select one:

matter is only chemically changed during digestion

matter is both physically and chemically changed during digestion

matter is only physically changed during digestion

heat and thermal energy is created as a result of digestion
Chemistry
2 answers:
vlabodo [156]3 years ago
4 0

Answer:

the student will have high blood presure and diabetets

Explanation:

ziro4ka [17]3 years ago
3 0

Answer:

a is the right answer

Explanation:

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Answer:

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Explanation:

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Calculate the concentration of OH- in a solution that contains 3.9 x 10-4 M H3O+ at 25°C. Identify the solution as acidic, basic
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Answer:

[OH⁻] = 2,6x10⁻¹¹

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Explanation:

The kw in water is:

2 H₂O(l) ⇄ OH⁻(aq) + H₃O⁺(aq)

kw = [OH⁻] [H₃O⁺] = 1,00x10⁻¹⁴

If concentracion of H₃O⁺ is 3,9x10⁻⁴M:

[OH⁻] [3,9x10⁻⁴M] = 1,00x10⁻¹⁴

<em>[OH⁻] = 2,6x10⁻¹¹</em>

pH is defined as - log[H₃O⁺]. If pH>7,0 the solution is basic, if pH<7,0 solution is acidic, if pH=7,0 solution is neutral.

In this problem,

pH = - log [3,9x10⁻⁴M] = <em>3,4</em>

As pH is < 7.0, the solution is <em>acidic</em>

<em></em>

I hope it helps!

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