Which of the following is a base?
O
A. HNO3 (nitric acid)
O
B. HI (hydroiodic acid)
O
C. H2CO3 (carbonic acid)
O
D. Ca(OH)2 (calcium hydroxide)

Which of the following is a base O A HNO3 nitric acid O B HI hydroiodic acid O C H2CO3 carbonic acid O D CaOH2 calcium hydroxide class=