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NeTakaya
3 years ago
14

22 You have the following acids and their conjugate bases available: Acetic Acid: CH 3COOH/CH3COO-; Ka = 1.8 × 10-5 Carbonic Aci

d: H2CO3/HCO3-; Ka = 4.2 × 10-7 Formic Acid: HCOOH/HCOO-; Ka = 1.8 × 10-4 Hydrofluoric acid: HF/F-; Ka = 7.2 × 10-4 Which of these acid/conjugate base pairs would be the best choice for a buffer in the range of pH 4.5?
hydrofluoric acid


formic acid


acetic acid


carbonic acid
Chemistry
1 answer:
lana66690 [7]3 years ago
8 0
Acetic acid is the closest to 4.5 in my opinion.
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Provide an explanation that is grounded in polarity that better explains why oil is not miscible in vinegar.
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Explanation:

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What is a maximum negative displacement of a wave
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Please help! If a forensic chemist discovers evidence through examination which would prove a person guilty of a crime, why then
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A nuclear power plant operates at 40.0% efficiency with a continuous production of 1042 MW of usable power in 1.00 year and cons
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Answer:

3.00 x 10^-11 joules / atom of U-235

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We know that the formula for Power = Work done (w)/Time (t)

We need to get the joules from power , since Joules is the SI unit of work.

From the formula P = W/t

W = Power (P) * Time (t)

The SI unit for Time is seconds, hence we change 1 year in seconds

1yr * 365 days/yr * 24hrs/day * 60mins/hr * 60 secs/min = 31536000 secs

It was stated in the question that the plant operates at an efficiency of 40%,

Thus to get the true power we divide the power provided in the question by 0.4 or 40%

= X(0.4) = 1042MW

True Power X = 1042/0.4 = 2605MW

Thus true power = 2605 * 10^6 Watts

Now we have the time in seconds and true power in Watts, we then find the work done.

From our above formula P = W/t

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Finally, we can solve for our energy (work):

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We then calculate the amount of energy released by only 1 single uranium-235 atom.

= 8.22 x 10^16 joules / 1.07x10^6 g U-235 (235 g / 1 mol)(1 mol/6.0210^23 atoms)

= 3.00 x 10^-11 joules / atom of U-235

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