Based on atomic size, which would you expect to be more soluble in water: helium, He, or nitrogen, Image?
A) Although He is smaller, its outer orbital is filled and the atom will have little attraction to the water molecules.
B) Since He atoms are smaller, more of them can fit into solution, so it has a higher solubility in water.
C) Nitrogen atoms are bigger and so nitrogen molecules should be more soluble in water due to greater dipole-induced dipole attractions.
D) He atoms are bigger and so helium molecules should be more soluble in water due to greater dipole-induced dipole attractions.
Answer: C
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Which of the following is thought to explain why Venus has so much more atmospheric gas than Earth?
A) Most of the gases that have been released from volcanoes on Earth later returned to the surface. B) Venus has gained much more gas through outgassing than has Earth. C) Because of its lack of magnetic field, Venus has been able to gain gas through the impacts of solar wind particles, while Earth has not gained gas in this way. D) Earth has lost much more gas to thermal escape than has Venus.
A resistor and an ideal inductor are connected in series to an ideal battery having a constant terminal voltage V0. At the moment contact is made with the battery,
(a) the voltage across the resistor is A) V0. B) V0/e. C) V0/2. D) zero. (b) the voltage across the inductor is A) V0. B) V0/e. C) V0/2. D) zero.
The Triassic is a(n)
a. epoch. b. era. c. eon. d. period.
In an SEM, the crystallographic orientation of the surface is determined by the diffraction of
(a) Secondary electrons (b) Emitted x-rays (c) Backscattered electrons (d) The primary electron beam