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Korvikt [17]
2 years ago
5

Please answer this question only if you know the answer! 30 points and brainliest!

Chemistry
2 answers:
liq [111]2 years ago
5 0

A. i think it’s  the  correct answer

telo118 [61]2 years ago
5 0

A. The circuit has insufficient power supplied by the battery

Was their meant to be a diagram?

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The diagram below is an artist’s impression of a single atom of element Be. The neutrons are shown with stripes, the protons are
lara [203]
The correct option is B.
Isotopes refers to those chemical compounds which have the same number of protons and electrons but different number of neutrons, so they end up having different mass numbers.  The diagram given above is that of beryllium, which has atomic number 4 and it has 2 electrons in its outermost shell. It has four protons [same as the number of electrons] and 5 neutrons. Beryllium 10, which is its isotope has four electrons, four protons and 6 neutrons. To get the number of neutron, remove the number of electrons from the number given in the option, that is, 10 - 4 = 6.
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Prompt
barxatty [35]

Answer:

Clear Communication

Explanation:

Clear communication in key when working with a team on a project. Without communication things get messy. Having clear communication with your team mates helps to prevent miscommunication, issues in planning and completing the project, and more. Clear communication can also help you to hear everybody out to come out with the best version of your project and to prevent fighting that would take up time that you could be working.

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2 years ago
What is the percent composition of a solution in which 480 grams of sodium chloride, NaCl, is dissolved in 4 liters of solution.
ZanzabumX [31]
 12% NaCl is the answer I came to... Have a GREAT day!!! :)

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3 years ago
How will an increase in wind speed affect soil erosion?
AnnyKZ [126]

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A. Soil erosion will increase.

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3 years ago
Would anyone be able to give a good explanation of what
mezya [45]

Answer and Explanation:

Aspirin is odorless, but when left exposed to air in the environment, it gradually hydrolyzes into salicylic acid and acetic acid as that is the precursor for synthesizing Aspirin.

Using this hydrolyzed aspirin for titration would not be advised, because it would affect the reading of the titration. Ordinarily, apsirin is a weak acid and direct titration of aspirin is problematic because it hydrolyzes pretty fast to salicylic acid— leading to an unwanted side reaction which may or may not go to completion. Therefore, excess base must be added and heat is supplied to the mixture so that neutralization and hydrolysis are complete. The remaining base is then titrated. This is called back titration.

Now, in back titration, instead of using solution whose concentration is expected to be known, we rather use excess volume of reactant which has been left over after the completion of a reaction with the analyte.

In this case, we use an alkali, preferably NaOH (1.0 mol/dm³). Te unused NaOH remaining after the hydrolysis is titrated against a standard HCl (0.1 mol/dm³). Then from the reaction equation of the aspirin and sodium hydroxide, the amount of NaOH required for the hydrolysis can be calculated.

Answering whether the titration goes up or down, it would be observed that the titration reading would GO DOWN because the exposed aspirin used has experienced some form of hydrolysis before it was used for titration, so the hydrolysis reaction it would undergo with acetyl-salicylic acid would be minimal, and this would affect the titration reading.

But if the aspirin wasn't left exposed to the environment, the reading would go up since more hydrolysis would take place in this case.

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3 years ago
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