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Many laboratory gases are sold in steel ...

Many laboratory gases are sold in steel cylinders with a volume of `43.8L`. What mass (in grams) of argon is inside a cylinder whose pressure is `17,180 kPa` at `20^(@)C`?

A

13.3 kg

B

12.35 kg

C

11.3 kg

D

10.3 kg

Text Solution

Verified by Experts

The correct Answer is:
B
Given : `V = 43.8 L` Ar mass = ? , p = 17180 kPa= 169.6 atm T = 293 K . Using pV = nRT
`n = (pV)/(RT) = (169.6 xx 43.8)/(0.082 xx 293) = 309.2` mol
Mass of Argon = moles (n) `xx` Atomic mass of Ar = `309.2 xx 39.95 = 12 , 352` g = `1 .2352 xx 10^(4) g`
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