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Leto [7]
3 years ago
13

A sample of gas contains 6.25 × 10-3 mol in a 500.0 mL flask at 265°C. What is the pressure of the gas in kilopascals? Which var

iables are given? pressure volume temperature moles
Chemistry
2 answers:
RideAnS [48]3 years ago
4 0

55.9 kPa; Variables given = volume (V), moles (n), temperature (T)

We must calculate <em>p</em> from <em>V, n</em>, and <em>T</em>, so we use <em>the Ideal Gas Law</em>:

<em>pV = nRT</em>

Solve for <em>p</em>: <em>p = nRT/V</em>

R = 8.314 kPa.L.K^(-1).mol^(-1)

<em>T</em> = (265 + 273.15) K = 538.15 K

<em>V</em> = 500.0 mL = 0.5000 L

∴ <em>p</em> = [6.25 x 10^(-3) mol x 8.314 kPa·L·K^(-1)·mol^(-1) x 538.15 K]/(0.5000 L) = 55.9 kPa

VashaNatasha [74]3 years ago
4 0

Which variables are given?

Answer:

volume

temperature

moles  

Which variables are unknown?

Answer:

pressure

Select the correct algebraic form for the equation to be used for this calculation.

Answer:

p= nRT/V

Solve the problem for the pressure of oxygen.

Answer:

55.9 kPa

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Answer: short answer short 0.65 / 5.37

15% NaOH by mass is 15g of NaOH in (100-15)g of solution.

No. Of moles of NaOH in solution = 0.65

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