Comparing the characteristics of two minerals, a student stated, "These two minerals are identical because they are both transparent and are six sided." Critique this statement
A) This statement is true.
B) This statement is probably true, but the chemical composition would need to be known.
C) There are different types of six-sided crystals, so there is not enough information to say they are identical.
D) This statement is false.
Answer: C
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The solvent diethyl ether can be mixed with water but only by shaking the two liquids together. After the shaking is stopped, the liquids separate into two layers, much like oil and vinegar. The free-base form of the alkaloid caffeine is readily soluble in diethyl ether but not in water. Suggest what might happen to the caffeine of a caffeinated beverage if the beverage was first made alkaline with sodium hydroxide and then shaken with some diethyl ether.
A. The water layer would turn a pink color indicating an alkaline pH. B. The caffeine would transform into the free acid and transfer into the diethyl ether. C. The caffeine would transform into the free base and transfer into the diethyl ether. D. The diethyl ether and water would mix into one layer.
List the three daily tide patterns and give examples of areas where each are common. What will be an ideal response?
Planetary differentiation relies upon
A) heat. B) chemical composition. C) pressure. D) density.
Storms that form over polar water behind (or poleward of) the main polar front are called
a. polar highs. b. poleward lows. c. leeside storms. d. arctic storms. e. polar lows.