QUESTION 34 Bromine has two naturally occuring isotopes, Br-79 and Br-81, approximately 50% of each. Bromomethane will contain approximately 50% Br-79 and 50% Br-81. The mass spectrum peak for methane containing Br-79 will be referred to as the M+ (molecular ion) peak, and the peak for Br-81 will be called the M+2 peak, as Br-81 weighs two more amu than Br-79. What will be the locations of the two bromomethane peaks on the mass spectrum and what will be the approximate ratio of their heights? M+ = 94.034m/z M+2 = 96.034 m/z Ratio = 4:1 M+ = 79.90 m/z M+2 = 94.934 m/z Ratio = 2:3 M+ = 79 m/z M+2 = 81 m/z Ratio = 1:1 M+ = 95.04 mlz M+2 = 97.04 m/z Ratio = 3:1 M+ = 94 m/z M+2 = 96 m/z Ratio = 1:1

2. Complete the reactions. Br NaCEN H₂/Pd

In the reaction H₂S + H₂O HS + H3O+ water is acting as a Bronsted Lowry base OH2S is acting as a Bronsted Lowry base OH30* is acting as a Bronsted Lowry base

Which of the following species is the conjugate of methamphetamine? A on omo a A b Select an answer and submit. For keyboard navigation, use the up/down arrow keys to select an answer. с B B с C d D +ZI D H NH

Why is isopropyl alcohol (main ingredient in rubbing alcohol) used as a disinfectant?

5 In the condensation reaction used in Part B, the water molecule is produced when a -OH from the carboxylic acid functional group in one molecule bonds to the proton of an alcohol functional group in the other molecule. Consider the two molecules below and answer the questions that follow. OH HO H₂SO4 a. Circle the -OH of the carboxylic acid group and the proton of the alcohol that combine to form H₂O. b. Recall that oxygen generally participates in two bonds and carbon participates in four. Draw a dotted line between the two atoms in the organic molecules that must bind to each other in order to maintain the typical bonding numbe for all atoms if the circled elements of the H₂O molecule separate from the reactants. c. In the box provided, draw the product formed by bonding the atoms connected by your dotted line.

Serotonin is an example of a(n): O amino acid neurotransmitter. amine neurotransmitter. O acetylcholine derivative. neuropeptide neurotransmitter.