explains this increase? a The 3. How b. 2 4. Prom the phase diagram below, what
ID: 592661 • Letter: E
Question
explains this increase? a The 3. How b. 2 4. Prom the phase diagram below, what does the transition from X to Y repres c. freezing d. melting In a certain mountain range, information that may be useful is the following 5. water boils at 91°C What is the atmospheric pressure under these conditions? Some R831 mol K a. 535 mmHg b.575 mmHg c. 615 mmHg d. 645 mmHg e. 685 mmiHg 6. Calculate the molarity of a solution that contains 85.0 g of HCI in 275 mL of solution. (MW HCI-36.5 g/mol.) a. 7.23 M b. 7.92 M c. 8.47 M d. 8.81 M e. 9.25 M
Explanation / Answer
Q1..
Option (a) is correct answer. As the temperature is increased the energy of particles increase, as a result more articles leave the liquid surface and enter into gaseous phase.
Q2...
Out of the given molecules CH3CH2OH wil have lower vapour pressure , because the intermolecular forces are stronger (H-bonding exist) in this molecule. As a result less number of molecules will enter the gaseous state. Hence option (d) ia correct answer.
Q3..
Option (b) is corresct answer. The eight particles at eight corners contribute one particle to the unit cell, because contribution of each orner atom is 1/8, and there are eight corners, so net contribution = 8 X 1/8 = 1.
And rhe atom in the center of the unit cell wholly and solly belongs to the unit cell...
Total atoms = 1 (corner contribution) + 1 (body center) = 2
Q4. .
The process represents melting.
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