Which of the following best describes the primary cause of the environmental problem known as acid-mine drainage?
A. chemical breakdown of sulfide minerals
B. excessive mining regulations
C. poorly ventilated underground mines
D. use of strong acids during mining operations
E. all of the answers listed here
Answer: A
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Surface winds for an anticyclone are convergent
Indicate whether the statement is true or false
Given the three compounds (i) acetic acid (ii) ethyl formate (iii) hydroxypropanone Which are constitutional isomers of one another?
A) only (i) and (ii) B) only (i) and (iii) C) only (ii) and (iii) D) They are all constitutional isomers of one another.
The ________ day is the time it takes for Earth to make one complete rotation with respect to a star other than our Sun
A) sidereal B) equinox C) Julian D) synodic E) zodiacal