Question 1 What is the likely molecular formula of the molecular compound formed by combining silicon (Si) and fluorine (F) atoms? Question 3 What type of transition is induced by the electromagnetic radiation absorbed by these substances? Question 4 The mass spectrum and infrared spectrum for a substance with the molecular formula C3H6O2 are shown below. What is the likely structure of the molecules that make up this substance? Empirical (A) Question 5 If the energy of the electrons in atoms and molecules WAS NOT quantized, what would be observed experimentally? Question 6 The following diagrams show the variation in the total energy (E) of two atoms as a function of the distance (d) between them. Which diagram represents the strongest and shortest chemical bond? Strongest & longest Question 7 Weakest & Longest Weakest & Shortest Which statement best describes why atoms are rarely found in the unbonded state (i.e., not bonded to other atoms)? Question 8 Use the following data to determine which vibrational transition requires radiation with the longest wavelength to be excited. Pay careful attention to the quantities and units used to represent the properties of the radiation. (D) Shortest Question 9 Least A molecular compound with the empirical formula CH2O produces the mass spectrum and infrared spectrum shown below. Which is the likely structure of its molecules? Question 11 Which of the electronic transitions represented in the energy level diagram below will produce a line at the longest wavelength in an absorption spectrum? (D) shortest & absorption (A) Shortest & Emission(B) Question 12 What is true about the kinetic energy (KE), potential energy, and total energy (TE = KE + PE) of an electron as it undergoes the transition represented in the image below? (B) (A) Which statement best describes why atoms are rarely found in the unbounded state? (i.e., not bounded to another atom) What is TRUE when electrons are delocalized between two atoms and a chemical bond is formed? EXAM 2B When a bond between two atoms is formed What is true about the kinetic energy (KE), potential energy, and total energy (TE = KE + PE) of an electron as it undergoes the transition represented in the image below? The energy level diagram of different atoms are shown below. Which atom has the electron moving at the lowest average speed? EXAM 3A (All wrong) EXAM 3B

Mass Spectrometry and Percent Composition Test 2 and 3

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