The following data were collected for the reaction: 2A -> 4B + C Time Concentration of A Concentration of B (minutes) (moles/L) (moles/L) 0. 1.000 0.000 10 0.800 0.400 20 0.667 0.677 30 0.571 0.858 40 0.500 1.000 50 0.444 1.112 1. Make a graph of the concentrations of A and B versus time. Estimate the rate of disappearance of A and the rate of formation of B at t= 25 min and at t= 40 min. Compare the rates of disappearance ofA and formation of B. What would you expect the rate of formation of C to be at t= 25 min and t = 40 min? %3D 2. Determine graphically whether the reaction in #1 above is a first order or a second order reaction. Calculate the rate constant for the reaction.

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

I need help with a chemistry question Which of the following properties is not a characteristic of the Group 1A elements (alkali metals)? They are shiny. They are good conductors of heat. Most of them are liquids at room temperature. They are good conductors of electricity. Answer format: 9 _________________

Maaliol is a fragrance found in patchouli oil. Draw the missing products and/or reagents in this synthesis of maaliol. Use a dash or wedge to indicate relative stereochemistry of substituents on asymmetric centers, where applicable. pa M H Os04 1. NH2NH2, KOH 2. SeO2 3. NH2NH2, KOH 7 Br ✔ o

Express Surgery Center's (ESC) preferred stock, which has a par value equal to $160 per share, pays an annual dividend equal to 10 percent of the par value. If investors require a 14 percent return to purchase ESC's preferred stock, what is the stock's market value? Do not round intermediate calculations. Round your answer to the nearest cent.

Calculate the value of Kc