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Alisiya [41]
3 years ago
15

According to the chart, which substance has the lowest OH- concentration?

Biology
2 answers:
devlian [24]3 years ago
7 0

Answer: B-lemon juice

Explanation:

SVEN [57.7K]3 years ago
6 0

The correct answer is option (B) lemon juice.

pH refers to the logarithmic scale used to indicate the acidity or basicity of an aqueous solution. It is the negative of the base 10 logarithm of the activity of the hydrogen ion. Solutions with a pH less that 7 are considered acidic and the solutions with a pH greater that 7 are considered to be basic. A pH of 7 is neither an acid nor a base and is considered neutral.

An acid has a high concentration of hydrogen ions (H+)  and a base has a low concentration of hydrogen ions. Higher the hydrogen ion concentration, pH is acidic. Among the given substances, lemon juice has a pH of 2, urine has a pH of 6, tomato juice has a pH of 4 and black coffee has a pH of 5.  Since lemon juice has a pH of 2, it has the lowest –OH ion concentration.

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Which is a synonym for genetic engineering?
marshall27 [118]

Answer:

Recombinant DNA technology

Explanation:

Recombinant DNA technology (also called genetic engineering) is the combination of DNA molecules from two different species to create new genetic combinations that would not otherwise be found in the genome and that is of great importance to science and other fields. Recombinant DNA technology is mainly involved in the isolation, characterization, and alteration of DNA in organisms’ genome to create improved or novel organisms.

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3 years ago
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In researching the structure of DNA, Erwin Chargaff found the amount of adenine always equaled the amount of which other base?
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How is the lithosphere different from the mantle?
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Answer:

The uppermost portion of the mantle makes up the bottom portion of the lithosphere. On average, it is 30 kilometers thick, but its thickness depends on the age of that portion of the lithosphere and temperature and pressure conditions. The mantle consists largely of heavy ultramafic rock like olivine.

Explanation:

The mantle is made up of molten rock called magma. This magma circulates in currents determined by the cooling and sinking of heavier minerals and the heating and rising of lighter minerals. All but the very uppermost portion of the mantle is part of the asthenosphere, which refers to the liquid zone of the inner Earth.

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Answer:

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Answer & explanation:

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A diabetic organism usually uses other compounds (such as ketones) in order to complement the missing glucose, these processes, however, can bring several complications, such as blood acidification.

The best advices for a diabetic individual to avoid this type of complication is to always check his/her glucose level, and also to be aware of the vaccination against influenza and pneumonia (considering that in diabetics this risk is greater).

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