In which of the molecules below is the carbon-carbon distance the shortest?
A) H2C CH2
B) H-CC-H
C) H3CCH3
D) H2C C CH2
E) H3CCH2CH3
Question 2
Although CaCO3 is essentially insoluble in pure water, it dissolves slowly in acidic ground water due to formation of ________.
A) insoluble Ca(OH)2
B) soluble Ca(OH)2
C) insoluble Ca(HCO3)2
D) soluble Ca(HCO3)2
E) soluble CaO