An organic compound absorbs strongly in the ir at 1687 cm-1. its 1h nmr spectrum consists of two signals, a singlet at 2.1 ppm and a multiplet centered at 7.1 ppm. its mass spectrum shows significant peaks at m/z 120, m/z 105 and m/z 77. this information is consistent with which of the following structures?

Based on the concept of the wave-like nature of light, huygens' theory of light postulates that the more light was "bent" by a substance the slower it would move while traversing across that substance. a) deflection b) interference c) refraction d) resonance

Is the time in tennessee the same as florida

Aball thrown by ginger is moving upward through the air. diagram a shows a box with a downward arrow. diagram b shows a box with an upward arrow. diagram c shows a box with a downward and upward arrow equal in size. diagram d shows a box with a downward and upward arrow with the downward arrow larger in size. which force diagram represents the forces on the ball? you may neglect the effects of air resistance.