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Chemistry, 20.07.2020 01:01 smartcookie8251
Two 250 mL samples of water are drawn from a deep well bored into a large underground salt (NaCI) deposit Sample #1 is from the top of the well, and is initially at 42 °C. Sample #2 is from a depth of 150 m, and is initially at 8 °C. Both samples are allowed to come to room temperature (20 °C) and 1 atm pressure. An NaCI precipitate is seen to form in Sample # 1.
A. A bigger mass of NaCl precipitate will form in Sample #2.
B. A smaller mass of NaCl precipitate will form in Sample #2.
C. The same mass of NaCl precipitate will form in Sample #2.
D. No precipitate will form in Sample #2.
E. I need more information to predict whether and how much precipitate will form in Sample #2.
A student sees tiny bubbles clinging to the inside of an un-opened plastic bottle full of carbonated soft drink. The student opens the bottle, and hears a loud hiss as gas under pressure escapes from the bottle.
A. The bubbles will shrink, and some may vanish.
B. The bubbles will grow, and more may appear.
C. The bubbles won't change.
D. I need more information to predict what will happen to the bubbles.
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Chemistry, 22.06.2019 17:10, sophiaa23
)benzene and toluene form nearly ideal solutions. consider an equimolar solution of benzene and toluene. at 20 °c the vapour pressures of pure benzene and toluene are 9.9 kpa and 2.9 kpa, respectively. the solution is boiled by reducing the external pressure below the vapour pressure. calculate (i) the pressure when boiling begins, (ii) the composition of each component in the vapour, and (iii) the vapour pressure when only a few drops of liquid remain. assume that the rate of vaporization is low enough for the temperature to remain constant at 20 °c.
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Two 250 mL samples of water are drawn from a deep well bored into a large underground salt (NaCI) de...
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