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Oliga [24]
2 years ago
13

Freeeeeeeeeeee Poinnnnnnntttsss

Chemistry
2 answers:
Marina CMI [18]2 years ago
8 0
Hellllooooo how are you
leva [86]2 years ago
5 0

Answer:

thanks

Explanation:

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Why are there so many capillaries in the lungs?
AysviL [449]
There's a lot of capillaries in the lungs because the blood needs to be transferred and the capillaries are the smallest vessels that can do this.
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3 years ago
Define the term chemotherapy.​
Ksivusya [100]

I'm not able to understand that what is written in the pic.. As I can't understand this language..

Treatment that uses drugs to stop the growth of cancer cells, either by killing the cells or by stopping them from dividing. Chemotherapy may be given by mouth, injection, or infusion, or on the skin, depending on the type and stage of the cancer being treated.

8 0
2 years ago
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A 25.00 ml sample of hydrochloric acid solution, hcl, is titrated with 0.0512 m naoh solution. the volume of naoh solution requi
Tresset [83]

A 25.00 ml sample of hydrochloric acid solution, HCl, is titrated with 0.0512 m NaOH solution. the volume of NaOH solution required is 21.68 ml  then the molarity of the HCl solution is 0.044 M .

Calculation ,

Formula used : M_{1} V_{1} =M_{2} V_{2}                            ...( i )

Where M is the molarity or concentration and V is the volume in ml .

concentration of hydrochloric acid solution ( M_{1}    ) = ?

concentration of NaOH ( M_{2} ) = 0.0512 M

volume of hydrochloric acid solution  ( V_{1} ) = 25.00 ml

volume of NaOH ( V_{2} ) =  21.68 ml

Putting the value of concentration , volume of both  in equation ( i ) we get .

M_{1}   × 25.00 ml = 0.0512 × 21.68 ml

M_{1}    = 0.0512 × 21.68 ml / 25.00 ml= 0.044 M

to learn more about hydrochloric acid solution please click here ,

brainly.com/question/24586675

#SPJ4

5 0
1 year ago
The correct IUPAC name for the following molecule is: _________
andrew-mc [135]

Answer:

A.) trans-2,3-dichloro-5-methyl-2-hexene

Explanation:

The proposed question and structure has been attached to this answer.

The<em> cis</em>- and <em>trans</em>- isomers are used to denote the alignment of the functional groups to the carbon chain side. From the diagram, we see that:

  • the two chloro groups on the main compound are in opposite directions (-<em>trans</em>), and not the same sides (-<em>cis</em>)
  • The bottom extended methyl group is on the 5th carbon as we count from left to right
  • there's a total of 6 carbon atoms with 1 double bond on the second to third carbon.

Hence the name <u>trans-2,3-dichloro-5-methyl-2-hexene</u>

8 0
2 years ago
Calculate the percent composition of these compounds: (Ethane:C2H6) and (Sodium hydrogen sulfate: NaHSO4).
vampirchik [111]

For the first compound,
Molar Mass of C=12.01x 2 =24.02
Molar Mass of H= 1.01x 6= 6.06
So molar mas of C2H6= (12.01x2)+(1.01x6) = 30.08
To get the percent composition, the formula is “(Total MM of C in molecule)/(Total MM of molecule)x 100”.
Here is the solution:
% of C= 24.02/30.08 x 100 = 79.9
% of H=6.06/30.08 x 100=20.1
To check if it is equal to 100%, you just have to add the percentages.
For the second compound,
Molar Mass of Na=22.99 x 1 =22.99
Molar Mass of H= 1.01x 1= 1.01
Molar Mass of S= 32.07x 1= 32.07
Molar Mass of O = 16.00 x4 = 64.00
So molar mas of NaHSO4= (22.99)+(1.01)+(32.07)+(16.00x4) = 120.07
To get the percent composition, the formula is “(Total MM of C in
molecule)/(Total MM of molecule)x 100”.
Here is the solution:
% of Na= 22.99/120.07 x 100 = 19.2
% of H= 1.01/120.07x 100 = 0.8
% of S= 32.07/120.07x 100 = 26.7
% of O= 64/120.07 x 100 = 53.3
To check if it is equal to 100%, you just have to add the percentages.

7 0
3 years ago
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