Explanation: Process is diffusion. The gas molecules follow a zig-zag path through the tube as they collide with the air molecules in the tube. The purpose of the glass tube is to eliminate air currents and to see if the gas molecules will move on their own.
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Answer:
Mass = 2.222 g
Explanation:
Given data:
Volume of neon gas = 2.56 L
Temperature = 273 K
Pressure = 1 atm
Mass of neon gas = ?
Solution:
PV = nRT
n = PV / RT
n = 1 atm × 2.56 L/ 0.0821 atm. L / mol. K× 273 K
n = 2.56 L.atm / 22.4 atm. L/ mol
n = 0.11 mol
Mass = number of moles × molar mass
Mass = 0.11 mol × 20.2 g/mol
Mass = 2.222 g
Answer: 1.7 moles
Explanation:
Given that:
Volume of water V = 1.5L
(since 1 liter = 1dm3
1.5L = 1.5dm3)
Temperature T = 100°C
Convert Celsius to Kelvin
(100°C + 273 = 373K)
Pressure P = 3.5 atm
Number of moles of steam N = ?
Note that Molar gas constant R is a constant with a value of 0.0082 ATM dm3 K-1 mol-1
Then, apply ideal gas equation
pV = nRT
3.5atm x 1.5dm3 = n x (0.0082 ATM dm3 K-1 mol-1 x 373K)
5.25 = n x 3.06
n = 5.25/3.06
n = 1.7 moles
Thus, 1.7 moles of steam is present
