1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
coldgirl [10]
3 years ago
13

You measure the pH of your backyard soil and find it is 7. You measure the pH of your friend's backyard soil and find it is 4. H

ow much greater is the concentration of the hydrogen ions in your friend's backyard than in your backyard?
Biology
1 answer:
olchik [2.2K]3 years ago
4 0

Answer:

1000 times.

Explanation:

Hello,

In this case, since the pH is defined by:

pH=-log([H^+])

If we want to compute the concentration of hydrogen we must write:

[H^+]=10^{-pH}

Thus, for both the backyard soils we compute:

[H^+]_{pH=7}=10^{-7}=1x10^{-7}M

[H^+]_{pH=4}=10^{-4}=1x10^{-4}M

It means that:

\frac{[H^+]_{pH=4}}{[H^+]_{pH=7}} =\frac{1x10^{-4}M}{1x10^{-7}M}\\ \\\frac{[H^+]_{pH=4}}{[H^+]_{pH=7}}=1000

It means that the concentration of hydrogen at a pH of 4 is 1000 times greater than the concentration of hydrogen at a pH of 7.

Regards.

You might be interested in
Which of the following statements about El Niño is true ?
photoshop1234 [79]
What are the answer choices?
8 0
3 years ago
People with diabetes often receive insulin injections. What effect does insulin have on the body?
Gennadij [26K]

The right answer is B.

Insulin is a hormone naturally secreted by the pancreas, specifically by specialized cells located in the islets of Langerhans. It allows glucose (sugar) to pass blood into the cells of the body. These will use glucose as energy or store it for future use.

In healthy subjects, insulin is secreted continuously. The body produces insulin according to the needs and foods consumed. For example, after a meal, the pancreas secretes additional insulin, allowing blood glucose to stay within normal limits.

8 0
3 years ago
Read 2 more answers
Which image shows labeled organelles that are present ONLY in plant cells?
daser333 [38]

Answer:

The answer would be A, only chloroplasts and vacuoles are found in plant cells. :)

4 0
3 years ago
Read 2 more answers
10 branches of science first is definition of science
creativ13 [48]

Answer:

ham Bhan k Uthai xeya ta hamra Garmin lagai xa kathi la Kani k bara ma Pharo thanda lagai xai

7 0
1 year ago
In 2006, scientists found a fossil that seemed to have fish-like scales and four legs. It also had a bone structure in its neck
lianna [129]

Answer:

Option-C

Explanation:

Scientists found a fossil of a fish with four limbs or legs. The fossil was estimated to be around 375 million years old.  

The fossil showed the fins and scales of a fish but they also possess the bones of proto-wrist, shoulders and the elbow.

The presence of these bones can be a clue that the fish evolved the limbs to walk on the land and will later evolve into animals belonging to amphibians, reptiles and mammals. Therefore, the Tiktaalik is considered the missing link of how life evolved from water to land.

Thus, Option-C is correct.

4 0
3 years ago
Other questions:
  • What is the biggest organ in the human body?
    9·2 answers
  • Which of the following structures: make energy for the cell
    12·1 answer
  • I need help bhadd this is so hard you guys and helpers
    9·2 answers
  • Bacteria and bacteriophages are undergoing an evolutionary battle. In particular, phages that infect Salmonella enterica can use
    11·1 answer
  • Which of the following best describes what happens to water molecules after they enter the atmosphere through the process of eva
    7·2 answers
  • What is it called when some traits require more than one gene to be fully expressed?
    13·1 answer
  • Help please
    12·1 answer
  • You classified organisms based on anatomical structure and development. Scientists also use DNA to classify organisms. Consideri
    5·1 answer
  • What is april?? co.me he.re qvuutrksra​
    13·1 answer
  • What is the modern name for organisms that are too small to be seen without a microscope?
    13·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!