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Natali [406]
3 years ago
7

425 mL of neon gas at -12°C and 788 mmHg

Chemistry
1 answer:
pashok25 [27]3 years ago
8 0

Answer:

The final temperature is 806.226 degrees celcius.

Explanation:

It is given that initial conditions are as follows,

<em>Initial volume = 425 ml</em>

<em>Initial temperature =- 12 degrees celcius = 261 K</em>

<em>Initial pressure =788 mmHg</em>

The final conditions are as follows,

<em>Final volume = 2.4 liters</em>

<em>Final pressure = 577 mmHg</em>

<em>Final temperature = "T"</em>

<em>Let R be universal gas constant, n be number of moles..</em>

The ideal gas equation, is as follows,

(pressure)(volume) = (number of moles)(R)(temperature)

The number of moles remain constant in the process,

so equating <em>initial number of moles = final number of moles</em> , we get

\frac{(788)(425)(10^{-3}}{261} = \frac{(577)(2.4)}{T}

T = 1079.226 K = 806.226 degrees celcius

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Given:

Acetic Acid/Sodium Acetate buffer of pH = 5.0

Let HA = acetic acid

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Total concentration [HA] + [A-] = 250 mM ------(1)

pKa(acetic acid) = 4.75

Based on Henderson-Hasselbalch equation

pH = pKa + log[A-]/[HA]

[A-]/[HA] = 10^(pH-pKa) = 10^(5-4.75) = 10^0.25 = 1.77

[A-] = 1.77[HA] -----(2)

From (1) and (2)

[HA] + 1.77[HA] = 250 mM

[HA] = 250/2.77 = 90.25 mM

[A-] = 1.77(90.25) = 159.74 mM



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Explanation:

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Answer:

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Explanation:

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Knowing the 0.900 mol of SO3 is placed in a 2.00-L it means we have a 0.450 mol/L of SO3

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