wwwww 1. With regards to regioselectivity in the addition reactions of alkenes, what is Markovnikov's rule? (1 point) when un symmetrical alkenes combine hydrohalic acids, the halogen adds to the carbon with the least amount of hydrogen atoms 2. In the bromination reaction of E-stilbene, why is Markovnikov's rule irrelevant? (1 point) Alkenes react with diatomic halogens to form electrophilic addition products. 3. In the bromination reaction of E-stilbene, why don't carbocation rearrangements occur? (1 point) Reaction is through a halonium ion instead of a carbocation. 4. In the bromination reaction of E-stilbene, why does anti addition take place instead of syn addition? (2 points) 5. Draw the complete curved-arrow mechanism for the bromination of trans-stilbene. Do not copy and paste from someone else's work, must be original. (3 points)

17.100 ml of 5:3:2 ethylene: chloroform: isoamyl alcohol 18. Convert 50 ppm to g/L 19. Convert 50 ppm to mg/L 20. Convert 5 ppb to ul/l

Assume the data below was collected for two different sample solutions using the same experimental procedure you carried out. Based on the two lines shown below, which solution (orange data points or blue data points) corresponds to the sample that would look DARKER in terms of how much light goes through the glass. 0.9 y= 4.7713x - 0.0728 R0.99953 0.8 0.7 0.6 0.5 0.4 0.3 0.2 y1.414x - 0.0546 R0.99642 0.1 0.02 0.04 0.06 0.08 0.1 0.12 0.14 0.16 0.18 0.2 0.1 [Concentration, M] orange data points (lower line) blue data points (upper line) Absorbance

1. The toxicity of mercury depends greatly upon the formulation of the metal. Which of them (elemental, metal ion, or methyl-mercury) is more likely to be absorbed through the skin? Explain your answer.

What do you think are the chemical reactions involved in breathalyzer test administered to potentially drunk drivers? Provide the reactants and products of the reaction and explain what observations would indicate if the person was drunk

CONCLUSIONS: In general, the boiling points of compounds increase down a group in the periodic table. The melting points and boiling points for the hydrogen compounds of group 6A elements are in the table below. Melting Point (°C) Boiling Point (°C) H₂O 0.0 100.0 H₂S -82.0 -60.0 H₂Se -65.7 -41.2 H₂Te -49.0 -2.2 Use your understanding of chemistry to propose an explanation for the anomaly in the trend for the hydrogen compounds of group 6A elements shown in the table.

Mr. Alverez has a blood calcium level of 10.3 mg/dL. What amount of his blood (in liters) would contain 0.491 g of calcium?

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