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
kherson [118]
3 years ago
12

Which resources are significantly polluted by heavy metals like mercury?

Chemistry
2 answers:
Scrat [10]3 years ago
6 0

Answer D!!! both A and B

Explanation:

arlik [135]3 years ago
4 0
<span>Heavy metals like mercury enter waterways by industrial dumping and poor regulatioin of effluent, and they also enter soil through a similar manner, in which waste is disposed of imporperly. Another source of heavy metals are the gases leaving industry carrying these metals. The metals fall as a solid on to soil and water ways. Therefore, the answer is D.</span>
You might be interested in
(1.7 x 10-5 m) x (3.72 x 10-4 m) *
rosijanka [135]

Answer:

The answer will be 1992/5 or 398.4

7 0
3 years ago
Which statement is true about a pseudoscientific idea? It is biased in its results. It can be tested and observed. It can be rep
vesna_86 [32]
<span>It is biased in its results.

</span>
6 0
3 years ago
Read 2 more answers
[H3O+] [OH−] pH Acidic or Basic 3.5×10−3 _____ _____ _____ _____ 3.8×10−7 _____ _____ 1.8×10−9 _____ _____ _____ _____ _____ 7.1
ankoles [38]

Answer:

See explanation below

Explanation:

I'm assuming this is a table you need to complete, so, you are not putting this in order, but I already found it in another place. let's do a little summary of the expressions we need to use in order to complete the chart.

To calculate pH we need the following expression:

<em>pH = -log[H3O+] (1)</em>

From this expression we can solve for [H3O+] in case we need it:

<em>[H3O+] = 10^(-pH)   (2)</em>

When we have [OH-] we calculate the pOH and from there, the pH:

<em>pOH = -log[OH-]  (3)</em>

and [OH-]:

<em>[OH-] = 10^(-pOH) (4)</em>

Finally to get the pH from pOH:

14 = pH + pOH

<em>pH = 14 - pOH (5)</em>

With these 5 expressions we can complete the chart. In picture 1, you have the actual chart.

To know if it's acidic or basic, that depends on the value of pH.

If pH <7 it's acidic

If pH >7 it's basic

If pH = 7 it's neutral

<u><em>First case:</em></u>

[H3O+] = 3.5x10^-3

pH = -log(3.5x10^-3) = 2.46  (acidic)

pOH = 14 - 2.46 = 11.54

[OH-] = 10^(-11.54) = 2.88x10^-12 M

<u><em>Second case:</em></u>

pOH = -log(3.8x10^-7) = 6.42

pH = 14 - 6.42 = 7.58 (it's basic)

[H3O+] = 10^(-7.58) = 2.63x10^-8 M

<u><em>Third case:</em></u>

pH = -log(1.8x10^-9) = 8.74 (it's basic)

pOH = 14 - 8.74 = 5.26

[OH-] = 10^(-5.26) = 5.5x10^-6 M

<u><em>Fourth case:</em></u>

[H3O+] = 10^(-7.15) =7.08x10^-8 M   (Basic)

pOH = 14 - 7.15 = 6.85

[OH-] = 10^(-6.85) = 1.41x10^-7 M

Hope this can help you

7 0
3 years ago
Suppose you have an Internet friend who study chemistry just like you are your friend claims the change from liquid water to wat
NISA [10]
Dear friend,

Because the water remains water throughout this process, it is not undergoing any chemical change. There is no new substance or element added but only a change of form.
6 0
3 years ago
.The ___________ is the muscular organ that pumps blood through the circulatory system by rhythmic contractions and relaxation.
emmasim [6.3K]
I think it’s the heart lol. Hope this helps
6 0
3 years ago
Other questions:
  • Which description is not a property of an acid?
    13·2 answers
  • 1. The Russian chemist who designed the first accepted version of periodic table in the 1800s was ______________.
    7·1 answer
  • What evidence do you see that a chemical reaction is taking place when you add hydrogen peroxide to potassium ioxide??
    9·1 answer
  • Which of the following elements are good insulators?
    6·2 answers
  • What land feature creates new land? <br> Glacier <br> Basin<br> Volcano <br> Desert
    11·1 answer
  • The burning of a solid waste is called
    5·1 answer
  • How did oxygen first enter Earth's atmosphere?
    15·1 answer
  • "Reduce, reuse, recycle." Give examples of how one or more of
    12·1 answer
  • Help please you don’t need to show work
    9·1 answer
  • Please help with yes or no
    7·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!