The answer is A. Friction
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Answer:
111.6 g
Explanation:
Given
m + M = 2.58 / 9.8
= 0.2632 kg
When the can of fruit juice is balance from scale , we get following relation
M x ( 50 - 21.2 ) = m x 21.2 ( balancing the torque due to weight of scale and can about the balancing point )
M x 28.8 = 21.2 m
= 21.2 ( 0.2632 - M )
= 5.58 - 21.2 M
M ( 28.8 + 21.2 ) = 5.58
M = .1116 kg
= 111.6 g
From tables,
SVP at 30°C = 4.24 kPa
From ideal gas expressions;
n = PV/RT = (4.24*1000*450)/(8.314*303) = 757.4 moles
Now, 75% of 757.4 moles will evaporate leaving 20%. Then, 25% of 757.5 moles...
25% of 757.4 moles = 25/100*757.4 = 189.35 moles
Mass of 189.35 moles = 189.35 moles*18 g/mol = 3408.3 g ≈ 3.4 kg