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Anna11 [10]
3 years ago
15

Which of the following describes a community?

Chemistry
2 answers:
Ostrovityanka [42]3 years ago
7 0
I would say the answer is C
Lapatulllka [165]3 years ago
3 0
Option C most closely describes a community. Ecosystem might be a better word instead of 'community.'
Hope this helps and please give brainliest1
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Tpy6a [65]

Answer:

In a physical change the appearance or form of the matter changes but the kind of matter in the substance does not. However in a chemical change, the kind of matter changes and at least one new substance with new properties is formed.

3 0
3 years ago
Calculate the ph of a solution at 25. 0 °C that contains 2. 95 × 10^-12 m hydronium ions.
Makovka662 [10]

The pH of a solution at 25. 0 °C that contains 2. 95 × 10^-12 m hydronium ions is 13.5.

<h3>What is pH? </h3>

pH is defined as the concentration of the hydrogen bond which is released or gained by the species in the solution which depicts the acidity and basicity of the solution.

<h3>What is pOH? </h3>

pOH is defined as the concentration of the hydronium ion present in solution.

pOH value is inversely proportional to the value of pH.

pH value increases, pOH value decreases and vice versa.

Given,

Total H+ ions = 2.95 ×10^(-12)M

<h3>Calculation of pH</h3>

pH = -log[H+]

By substituting the value of H+ ion in given equation

= log(2.95× 10^(-12) )

= 13.5

Thus we find that the pH of a solution at 25. 0 °C that contains 2. 95 × 10^-12 m hydronium ions is 13.5.

learn more about pH:

brainly.com/question/12942138

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8 0
2 years ago
Brass is a solid solution composed of zinc and copper. Brass is classified as a (n): A.colloid B.suspension C.solution D.alloy
melamori03 [73]
Brass is an alloy, or a combination of two (or more) metals.
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After leaving the cockroaches in their metabolic chamber for one hour the gases in the chamber was measured. The fraction of oxy
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I think it's B

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What do these images model ?
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The answer is A

Mark Brainliest ☺☻
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