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Allushta [10]
3 years ago
7

The pH scale measures the acidity of a substance. It is a negative logarithmic scale. A pH of 3 has a hydrogen ion concentration

(which is responsible for acidity) ten times greater than a pH of 4. How many times greater is the hydrogen ion concentration of a pH 2 solution than a pH 6 solution?
Biology
1 answer:
Hitman42 [59]3 years ago
6 0

Answer:

The correct answer is: a pH 2 solution has a <u>10000 times</u> greater hydrogen ion concentration than a pH 6 solution.

Explanation:

The pH scale is a measurement used to describe the acidity of a solution, and this acidity is given by the concentration of H+ (hydrogen ion) in said substance. A solution with a greater concentration of H+, is more acid than a solution with a smaller concentration of H+ and, therefore, has a lower pH. Given that the pH scale is a negative logarithmic scale, a solution with a pH of 3 has a ten times greater H+ concentration than a solution with a pH of 4.

A pH 2 solution has 10 times more H+ ion concentration than a pH 3 solution, 100 times more H+ ion concentration than a pH 4 solution, 1000 times more H+ ion concentration than a pH 5 solution, and 10000 times more H+ ion concentration than a pH 6 solution.

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Today there are now at least 13 species of finches in the galápagos islands and all of them evolved from one ancestral species w
tankabanditka [31]

Answer:

Adaptive radiation

Explanation:

Adaptive radiation refers to the evolution of the multiple species from one ancestral species. The force which drives the formation of new species is the change of natural environment like the availability of resources, niche, and many other related changes. The species adapt themselves to these changes and get transformed into new species.

The formation of a variety of species of finches on the Galapagos island is an example of adaptive radiation. The species formed as a result of the food resources they received on the island.

Thus, Adaptive radiation is the correct answer.

3 0
3 years ago
A feral cat needs to eat two mice a day to survive. A mouse needs to eat 5 seeds a day to survive. How many seeds are required t
Mars2501 [29]

Answer:

70 seeds

Explanation

5 is the food for a mouse  (day)x2 mice for cat=10. 10x7(week)=70 seeds

hope this helps!

3 0
3 years ago
The following ORs are reported for several hypothetical examples. Give your interpretation of the results, assuming all results
musickatia [10]

Answer:

a) Protective effect on the health or incidence of disease (low-fat diet and colon cancer)

b) No association between exposure and incidence of disease for health (aerobic exercise and dental caries)

c) Positive association between the incidence of disease and the exposure (exposure to side-stream cigarette smoke and lung cancer)

d) Positive association between the incidence of disease and the exposure (infectious disease of the pelvis and ectopic (tubal) pregnancy).

Explanation:

The interpretation of OR can measure the association between the frequency of exposure and health in a sample that is considered statistically significant. When the OR is equal to 1, it means that there is no association between exposure and an incidence of health disease. When the OR is equal to 0.5, it means that the exposure has a protective effect on the incidence of the disease on health. And finally, when the OR is above to 1, it means that there is a positive association between the incidence of the disease and the exposure.

a) OR = +0.6. Since this value is less than 1 but greater than 0.5, it means that the exposure has a protective effect on the health or incidence of the disease.

b) OR = +1.0. As in this case, the OR value is equal to 1, meaning that there is no association between exposure and the incidence of disease for health.

c) OR = +1.3. As in this case the value is greater than 1, it means that there is a positive association between the incidence of the disease and the exposure.

d) OR = +3.0. There is a positive association between the incidence of the disease and the exposure. The OR 3 value means that the incidence of the disease and the health result will be three higher in people who are exposed.

6 0
3 years ago
While assessing a 35-year-old patient, the nurse hears a vascular sound between the xiphoid process and the umbilicus. what can
malfutka [58]
While assessing a 35-year-old patient, the nurse hears a vascular sound between the xiphoid process and the umbilicus. What can the nurse presume from the sound?

Bruits

7 0
3 years ago
Help plz help due in 5 min
jeka57 [31]

Answer:

d. Ethos

Explanation:

The correct answer is actually D.

Ethos is usually referred to one's credibility when making an argument. It has to do with using one's trustworthy personality to persuade. This is a reason why ethos is employed in advertising a product or brand.

One with a good ethos is usually respected and regarded. Since celebrities like footballers, actors, athletes, etc., have influence and are respected in their societies, therefore advertisers tend to use them in endorsing their products because people love and believe them. So, people end up using those products because a celebrity endorsed it. The celebrities are usually paid for the endorsement.  

3 0
3 years ago
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