damarisxo4074 damarisxo4074 17-05-2023 Chemistry contestada which molecule below has a significant band in the 1720 - 1780 cm-1 range of its ir spectrum? 19) a) ch3cxcch2ch3 b) ch3co2ch2ch3 c) ch3ch2ch2oh d) ch3ch2ch(nh2)ch3