Question

They are just MCQs please let me know the answers for all the MCQs please.

100 isotopes of individual atoms 90 isotopic versions of a chlorine molecule 80 70 35 17 6 0 35cc 35c2 17 17 50 4 0 17 2 3 0 37cl 17 17 2 20 1 0 80 0 75 7 0 65 55 m/z 60 50 40 30 35 intensity (%) Question 1 1 pts The intensity (% ) of the peak or peak height is a measure of the relative abundance of the ions. Measure the height of each of the two peaks associated with the chlorine atoms and estimate the ratio of chlorine isotopes. O 60:40 O 75:25 50:50 20:80 Question 2 1 pts Based on your estimated ratio of chlorine-35 to chlorine-37, which of the following best represents the average mass of chlorine? O 34 37 O 38 35 amu C Question 3 1 pts Consider the three peaks associated with elemental or molecular chlorine (Cl2) Why are there three peaks for the Cl2 molecule? There are three ways to combine the two chlorines of different weight CI-35 and Cl-37 C-37 and Cl-35 CI-37 and Cl-37 There are three ways to combine the two chlorines of different weight: C-35 and Cl-35 CI-35 and Cl-37 Cl-37 and Cl-37 O Diatomic chlorine comprised of two chlorine-37 atoms is heavier than diatomic chlorine comprised of two chlorine-35 atoms. Diatomic chlorine comprised of two chlorine-35 atoms is heavier than diatomic chlorine comprised of two chlorine-37 atoms. Question 4 1 pts Why do the heights of the three Cl peaks vary? The large peak is Clp with two more abundant Cl-37 atoms, the second peak is from Cl2 with more abundant Cl-37 and less abundant Cl-37 and the smaller peak is from two of the less abundant Cl 37. The large peak is Cl2 with two more abundant Cl-35 atoms, the second peak is from Cl2 with abundant C-35 and less abundant Cl-37 and the smaller peak is from two of the less abundant Cl-37 The large peak is Clp with two less abundant Cl-37 atoms, the second peak is from Cl2 with more abundant Cl-37 and less abundant Cl-37 and the smaller peak is from two of the more abundant Cl 37. Acti O The large peak is Cl with two abundant Cl-37 atoms, the second peak is from Cl2 with less abundant Cl-35 and more abundant C-37 and the smaller peak is from two of the more abundant Cl-37. Go to C Question 4 1 pts Why do the heights of the three Cl2 peaks vary? The large peak is Cl2 with two more abundant CI-37 atoms, the second peak is from Cl2 with more abundant Cl-37 and less abundant Cl-37 and the smaller peak i is from two of the less abundant Cl- 37 O The large peak is Cl2 with two more abundant Cl-35 atoms, the second peak is from Cl2 with abundant Cl-35 and less abundant C-37 and the smaller peak is from two of the less abundant Cl-37 The large peak is Clp with two less abundant Cl-37 atoms, the second peak is from Cl2 with more abundant Cl-37 and less abundant Cl-37 and the smaller peak is from two of the more abundant Cl 37 The large peak is Clp with two abundant Cl-37 atoms, the second peak is from Cl2 with less abundant CI-35 and more abundant Cl-37 and the smaller peak is from two of the more abundant CI-37 Question 5 1 pts Hydrogen has two stable isotopes. How many peaks would you expect to find in the mass spec of H2? 6 O 1 C

Answer 1

Question 1 1pts The intensity (9%) of the peak or peak height is a measure of the relative abundance of the ions. Measure the height of each of the two peaks associated with the chlorine atoms and estimate the ratio of chlorine isotopes. O 60:40 75:25 O 50:50 O 20:80

Question 2 1 pts Based on your estimated ratio of chlorine-35 to chlorine-37, which of the following best represents the average mass of chlorine? O 34 O 37 O 38 35 amu 2(Atomic Mass ofIsotope i x Natural Ahmdance of lsotope i) Average AtomicMass 100% Hec Aveuge Muss of Chlvrine (Atomic Mass of Natural Abundance of3ci + Atomic Mass of 3c Natural Abundance ofC X 100% 35 amu X 75%37 amu X 25% 100% = 35.5 amu 35 amu

Question 3 1 pts Consider the three peaks associated with elemental or molecular chlorine (Cl2) Why are there three peaks for the Cl2 molecule? O There are three ways to combine the two chlorines of different weight CI-35 and Cl-37 CI-37 and Cl-35 Cl-37 and Cl-37 There are three ways to combine the two chiorines of different weight C-35 and C-35 C-35 and Cl-37 Cl-37 and Cl-37 O Diatomic chlorine comprised of two chlorine-37 atoms is heavier than diatomic chiorine comprised of two chlorine-35 atoms O Diatomic chlorine comprised of two chlorine-35 atoms is heavier than diatomic chlorine comprised of two chiorine-37 atoms.

Question 4 1 pts Why do the heights of the three Cl2 peaks vary? O The large peak is Cl2 with two more abundant Cl-37 atoms, the second peak is from Cl2 with more abundant Cl-37 and less abundant Cl-37 and the smaller peak is from two of the less abundant Cl- 37 The large peak is Ci2 with two more abundant Cl-35 atoms, the second peak is from Cl2 with abundant Cl-35 and less abundant Cl-37 and the smaller peak is from two of the less abundant Cl-37. O The large peak is Cia with two less abundant Cl-37 atoms, the second peak is from Cla with more abundant Cl-37 and less abundant Cl-37 and the smaller peak is from two of the more abundant Cl- 37. O The large peak is Cia with two abundant Cl-37 atoms, the second peak is from Cl2 with less abundant Cl-35 and more abundant Ci-37 and the smal ler peak is from two of the more abundant Cl-37.

Question 5 1 pts Hydrogen has two stable isotopes. How many peaks would you expect to find in the mass spec of H2? O 6 3 O 1 O 2 1) First peak for the H2 with two most abundent H isotopes 2) Second peak for the H2 with one of the most abundent H isotope and one of the least abundent H isotope 3) Third peak for the H2 with two least abundent H isotopes