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Marina86 [1]
3 years ago
12

1. The atmospheric gas that forms a mild acid when dissolved in water is _____. (1 point)

Biology
2 answers:
Triss [41]3 years ago
6 0
The atmospheric gas that forms a mild acid when dissolved in water is carbon dioxide. <span> The inscription on a marble gravestone to become harder and harder to read over time is caused by chemical weathering. Biological evolution is NOT a factor that affects the rate of weathering in rocks.</span>
Colt1911 [192]3 years ago
5 0

The answers are;

  1. Carbon dioxide
  2. Chemical weathering
  3. Biological Evolution


1. Carbon dioxide in the atmosphere mixes with rainwater for form carbonic acid;

CO2 + H2O  H2CO3 (a reversible reaction)

It is a weak acid because it dissociates partly in water with a pH of about 5.



2. Chemical weathering on the marble gravestone is due to rain. The rain is slightly acid because it has to dissolve carbon dioxide to form carbonic acid. The carbonic acid dissolves marble  (composed of largely calcium carbonate);

H2CO3 + CaCO3  Ca(HCO3)2 aq (CaHCO2 is soluble)



3. Biological evolution does not affect weathering of rock. Climate does. The higher the temperatures the rainfall, the higher the rate of weathering. Soft rocks like limestone are easily eroded by rainwater that rocks like quartz. The higher the surface area of rock exposed to these elements the higher their rate of weathering.


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Answer:

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3 years ago
(Ch. 27.4) Many people are allergic to substances in the environment, such as ragweed pollen, as well as foods, such as peanuts.
djverab [1.8K]

Answer:

C. The substance does not directly harm tissues and is not a pathogen, but nevertheless triggers an inflammatory response.

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The cells in the nervous system that fill spaces and give support to neurons are called
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Neuroglial Cells is the answer
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The head of a giraffe is 2.0 m above its heart and the density of the blood is 1.05 103 kg/m3. what is the difference in pressur
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