Which of the following is true of electrolytes?
A) All electrolytes have water as a solvent.
B) All electrolytes contain equal numbers of cations and anions.
C) both a and b
D) neither a nor b
D
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Which feature on this diagram is a hanging valley?
A) 1, the circular depression at the head of the valley
B) 2, a lake in the upper valley
C) 3, a steep ridge
D) 4, a valley that is above the level of the main valley
A(n) ____ is an accumulation of detrital sediment adjacent to an uplifted area
a. clastic wedge b. organic reef c. craton d. orogenic belt e. mobile belt
China has recently surpassed the United States as the world leader for
A) the supply of energy. B) energy efficient buildings. C) the demand of energy. D) the cleanest urban air quality. E) highest efficiency automobiles.
In which of the following cases is a polar covalent bond formed?
A) when an electron is transferred from one atom to another B) when the electrons of a bond are shared equally by the two atoms C) when the electrons of a bond are shared unequally by the two atoms D) when a metallic element forms a bond with a non-metallic element