Which compound has the lowest vapor pressure at 50°C?
2 answers:
Answer : The correct option is, (1) ethanoic acid.
Explanation :
The relation between the boiling point and the inter-molecular force of attraction is that the higher the boiling point, the stronger the inter-molecular force of attraction that means it requires more energy to breaks the forces between the molecules. Or, the higher the boiling point lower will be the vapor pressure.
In ethanoic acid, the hydrogen bonding will be stronger as compared to the propanone, ethanol and water.
In propanone, the dipole-dipole interaction occurs.
In ethanol and water, the hydrogen bonding occurs but polarity will be less.
Hence, ethanoic acid has the lowest vapor pressure at
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Answer:
<u>The new pressure is 1.0533 atm</u>
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Explanation:
According to<u> Boyle's Law :</u> The Pressure of fixed amount of gas is inversely proportional to Volume at constant temperature.
PV = Constant
P1V1 = P2V2
.....(1)
P1 = 3.16 atm
Accprding to question ,
V1 = V
V2 = 3 V
Insert the value of V1 , V2 and P1 in the equation(1)
V and V cancel each other
Answer:
1.115 g
Explanation:
Applying,
R = R'................... Equation 1
Where R = original sample of radon-222, R' = sample of radon-222 left after decay, n = Total time, t = half-life.
make R' the subject of the equation
R' = R/()............... Equation 2
From the question,
Given: R = 73.9 g, n = 23 days, t = 3.8 days.
Substitute these values into equation 2
R' = 73.9/()
R' = 73.9/
R' = 1.115 g