4 a) Justify the signals in the following Proton NMR spectrum. H₂N- 10

66 Match the description with the name of the drug. [Sorry there is no partial credit for matching questions) what oplate is found in some cough syrups? What drug is used to treat heroin overdosing? What drug is used to treat heroin addiction, but it is still addictive What drug is used in a patch for chronic pain management? Tolerance for a drug means that over time the dosage can be decreased to have the same effect as before. True False Opiates are all addictive True False Methadone answer not given novocaine "Narcan" or naloxone codeine fentanyl Endorphins and morphine bind to the same receptor sites in the brain True False Acupuncture causes the body to produce endorphins which is the body's own pain killers True False The histamine molecule that sits on the receptor sites in the respiratory system is a different molecule than the one that affects the receptor sites in the stomach True False

QUESTION 4 Rank the alkenes show in order of stability with 1 being most stable and 3 being least stable. ch8-d1-q3+4+5(2).jpg VA ✓ B

i. CH3 Common

Only typed solution

An analytical chemist weighs out 0.264 g of an unknown diprotic acid into a 250 mL volumetric flask and dilutes to the mark with distilled water. He then titrates this solution with 0.1900M NAOH solution. When the titration reaches the equivalence point, the chemist finds he has added 18.5 mL of NaOH solution. Calculate the molar mass of the unknown acid. Round your answer to 3 significant digits. x10 mol