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mixas84 [53]
2 years ago
13

EgahgrJGRAJGTHEFAHAEHRFAHAERHAFHRHFHRAFHAER

Chemistry
1 answer:
harina [27]2 years ago
6 0
Honestly me too tbhhhhhhhhh
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After performing a dilution calculation, you determine you need 25.0 milliliters of an aqueous stock solution to make 100.0 mill
IRINA_888 [86]
A is obviously out because it leads to a volume of 125.0 milliliters of the new solution and gives you a lower concentration than you were aiming for.

D is out because you are adding 75 milliliters of the stock solution, so your concentration would be too high. You only need 25.0 milometers of stock solution per 100 milliliters of the new solution.

C is also out because it leads to 50.0 milliliters stock solution per 100 milliliters of the new solution and hence the wrong concentration.

B is by default the correct answer. It also details the correct technique. First you add the stock solution (This you know from your calculations to be 25 milliliters.) then you add the water up to the volume you needed. (Because the calculations only tell you the total volume of water not what you need to add) You also add the water last so you can rinse the neck of the flask to make sure you also get all the stock solution residue into the stock solution.

I would add the final step of stirring, but B is the only answer that can be correct.
8 0
3 years ago
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An experiment applies heat to a substance and produces a gas that is a new and different substance. Choose the true statement.
sukhopar [10]
I believe it is C; reasoning being that the hint for physical change is," the producing of a gas," chemical "that's new and diff. substance. "
5 0
3 years ago
Do cells divide twice in asexual reproduction, sexual reproduction, or both?
igor_vitrenko [27]
Cells divide in asexual reproduction!


I hope this helps 



please mark me as brainliestt!!
8 0
3 years ago
Which of the following extends the furthest away from us?
vlada-n [284]

Answer:

A

Explanation:

The galaxy is the biggest thing and we're inside of it and the solar system is inside of it and inside the solar system is Jupiter and Tampa is on earth

5 0
3 years ago
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Homogeneous series of n-propyl bromide?
goldenfox [79]

The homologous series ( not homogeneous series ) of n-propyl bromide is C3H7Br. It is also known as 1-Bromopropane

n-propyl bromide or 1-bromopropane, is a solvent that is used in cleaning metals, vapor degreasing and also for dry cleaning.

<h3>What is Homologous series?</h3>

Homologous series is a family of organic compound which follows a regular structural pattern and in which successive members differs from one another by a molecular formula of CH2

Below are some of their characteristics:

  • The general formula of all compounds in the series is the same.
  • They have the same functional group.
  • Their physical properties such as melting point, boiling point, density, generally show a gradual change with increase of molecular formula in the series.

Learn more about homogeneous series:

brainly.com/question/14008526

3 0
2 years ago
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