answer.
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
alina1380 [7]
2 years ago
15

What is the pOH if a solution composed of 60mL of 0.0012M HCl and 200 mL of 0.0005M NaOH?

Biology
1 answer:
strojnjashka [21]2 years ago
8 0

Moles = Molarity * Volume

For HCl, Moles = 60 x 10^-3 * 1.2 x 10^-3 = 7.2 x 10^-5 moles

For NaOH Moles = 200 x 10^-3 * 5 x 10^-4 = 10 x 10^-5 moles

 

NaOh + HCl -> NaCl + H2O

 

7.2 x 10^-5 moles HCl reacts with 7.2 x 10^-5 moles NaOH to form NaCl and H2O

After reaction, Moles of NaOH left = 10 x 10^-5 – 7.2 x 10 ^-5 = 2.8 x 10^-5 moles

Now volume = 260 mL = 200 + 60. So, [OH-] = 2.8 x 10^-5 / 260 x 10^-3 = 0.010769 x 10^-2 = 1.0769 x 10^-4

pOH = 3.679

<span> </span>

You might be interested in
What are similarities and differences between the organization and structure of DNA in bacterial cells and in human cells?
Ilia_Sergeevich [38]
Both human and bacteria cells contain DNA and both have a outer membrane that controls how materials come into and leave the cell.

Predominantly multicellular not in bacteria but in human body

*Cell contains a nucleus and other membrane bound organelles not in bacteria but in human body..

*DNA occurs in a circular form* in bacteria only..

* Ribosomes size in bacteria 70s and in human body 80s

*Capable of growth at temperatures greater than 80 C only in bacteria

*His tone proteins present in cell only in human body cells

* Operons present in DNA only in bacteria..
5 0
2 years ago
In the Florida Everglades, Burmese pythons are an invasive species. They were introduced into southern Florida in 1992. These py
Verdich [7]

Answer:

B - Python predation has caused a trophic cascade that changed the mosquitoes' niche.

Explanation:

The passage infers that the predation by the Burmese pythons has reduced the population of the animals in Southern Florida thus making the Culex cedecei mosquito to have a reduced number of options to feed from. This is stressed when the author notes that these mosquitoes are now feeding on cotton rats which harbor the Everglades virus that also have the potentials of being transmitted to humans.

Summarily, the passage is saying that the invasion by the Burmese python has changed the niche of most animals including the mosquitoes in the Southern Florida's wild.

7 0
1 year ago
Why do you think the snowy owls only appear when
miv72 [106K]

Answer:

White owl is the symbol of wisdom. The snowy owl is the symbol of endurance. It represents big dreams along with the ability to achieve them. It is the sign of new beginnings and moving forward with all might.

6 0
2 years ago
Identify a reason why meiosis leads to significant genetic variation while mitosis does not.
liraira [26]
Because meiosis only has half of the genes.

In mitosis, the cell produced will have an exact number of chromosome like the parent cells. But in meiosis, only half of the chromosome will be given. That will make many variations since the chromosome is split in random. The process to split the gene doesn't include a process to making it move in the same manner so the gene position can be changed in the different case.
4 0
2 years ago
When the food you eat encounters the gastric juice in your stomach, chemical reactions help break down the food. Explain what yo
makvit [3.9K]

Answer:food undergo a chemical reaction by bond breaking example for starch to amylose is hydrolysis reaction where there is breaking of 1,4 glycosidic bondd

8 0
2 years ago
Other questions:
  • Which of the following statements correctly describes the normal tonicity conditions for typical plant and animal cells?
    13·2 answers
  • Explain the process of mitosis in a tissue culture for cancer cells
    12·2 answers
  • In a given chemical reaction the energy of the products is greater than the energy of reactants which statement is true for this
    13·1 answer
  • What color changes did you observe when you added Benedict's solution to the 5% glucose solution and heated it?
    9·1 answer
  • How does the simple primary and secondary structure of dna hold the information needed to code for the many features of multicel
    12·1 answer
  • Suppose that flu shots create a positive externality equal to $12 per shot. What is the relationship between the equilibrium qua
    10·1 answer
  • What role do the following cellular components play in the storage, expression, or transmission of genetic information. Drag the
    10·1 answer
  • Give two examples of safe, professional usernames. (1-2 sentences. 1.0 points)
    13·1 answer
  • You have a cup of beans in front of you with 20 white beans and 20 red beans. (You can also use candy, buttons, or coins). These
    5·1 answer
  • To test the quality of water sources in her area, Shameka collects five samples from each water source and tests the quality of
    8·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!