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3 years ago

9

Assuming the measured volume of the bottle, 140 mL, is correct, what volume does Charles’s Law predict the air in the bottle sho

uld occupy after cooling to 15oC? A) 108 mL B) 128 mL C) 140 mL D) 170 mL

1 answer:

Ket [755]3 years ago

5 0

Answer:

b. 128 ml

Explanation:

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A sample of Freon-12 (CF2Cl2) occupies 2.842 x 101 L at 331 K and 2.525 x 102 kPa. Find its volume (in L) at standard temperatur

Angelina_Jolie [31]

We have to first find the number of moles of Freon-12 in the sample using the ideal gas law equation
PV = nRT
n = $\frac{PV}{RT}$
since the number of moles at both conditions given and at stp we can write the following formula
$\frac{P1V1}{RT1} = \frac{P2V2}{RT2}$
where parameters for the given conditions are on the left side and parameters for STP conditions are on the right side of the equation
where P1 - pressure - 252.5 kPa
V1 - volume - 28.42 x 10⁻³ m³
R - universal gas constant
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STP conditions
P2 - 101 325 Pa
T2 - 273 K

substituting these values in the equation

$\frac{252 500Pa*28.42*10 ^{-3}m^{3} }{R*331K} = \frac{101325 Pa*V}{R*273 K}$

V = 58.41 L
Volume at STP is 58.41 L

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3 years ago

A 6.00 L container of N_2 has a temperature of 273 K. Calculate the volume if the temperature is doubled.

vfiekz [6]

V1/T1 =V2/T2 (using charles law)

V1=6.00
V2=?
T1=273
T2=273

Making V2 the subject of formula the equation then becomes

V2= V1xT2/T1

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List three aids with example that are useful for people who are optically impaired

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Magnifying Glasses, Telescopes and Glasses.

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Please hurry and tell the answer to:

Flura [38]

Answer:

6.50 g of Hydrogen

Explanation:

We know that in every 20.0g of sucrose, there are 1.30g of hydrogen.

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Hope this helps!

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1 year ago

What is the net ionic charge of a calcium ion?

vaieri [72.5K]

Answer:

Ca generally loses two electrons from its outer shell to form a Ca2+ ion.

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