How many electrons are gained or lost in the following half-reaction? Zn ? Zn+2
A. 2 electrons are lost
B. 1/2 electron is gained
C. 1/2 electron is lost
D. 2 electrons are gained
E. 4 electrons are gained
Answer: A
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Which of the following gives the correct order of solubility in water?
A) C2H5NH2 < C4H9NH2 < C6H13NH2 B) C2H5NH2 < C6H13NH2 < C4H9NH2 C) C6H13NH2 < C4H9NH2 < C2H5NH2 D) C6H13NH2 < C2H5NH2 < C4H9NH2
Given the prevailing wind direction indicated by the arrow, where would you expect temperatures to be warmest and the humidity lowest?
A. A B. B C. C D. D
The wavelengths of radiation that an object emits depend primarily on the object's ____
A) temperature B) photons C) density D) reflective surfaces
A water surplus occurs when
A) the potential evapotranspiration demand cannot be satisfied by precipitation inputs. B) the additional inputs of water into a system are not enough to satisfy potential evapotranspiration. C) potential evapotranspiration is greater than soil moisture. D) additional water exists after potential evapotranspiration is satisfied by precipitation inputs. E) all available surface water has evaporated.