Post Lab Questions: 1. What did you notice about the distance between the atoms as the number of bonds increased? (Compare bond of H2S and H20) 2. What is the relationship between atomic size and bond length for H2O/HS and CO2/ CS2? 3. What are the carbon-carbon bond lengths in each of these three molecules? Using Table 7.2 draw the structures for C2H, CH4 and C2H2, and determine the carbon-carbon bond lengths for each structure. 4. What is the pattern in bond length that you notice for the carbon compounds in question 3?

Two nitro no2 groups are chemically bonded to a patch of surface. they can't move to another location on the surface, but they can rotate (see sketch at right). it turns out that the amount of rotational kinetic energy each no2 group can have is required to be a multiple of ε, where =ε×1.010−24 j. in other words, each no2 group could have ε of rotational kinetic energy, or 2ε, or 3ε, and so forth — but it cannot have just any old amount of rotational kinetic energy. suppose the total rotational kinetic energy in this system is initially known to be 32ε. then, some heat is removed from the system, and the total rotational kinetic energy falls to 18ε. calculate the change in entropy. round your answer to 3 significant digits, and be sure it has the correct unit symbol.

Melissa is interested in her family tree and how her family has changed over its many generations. melissa probably more closely resembles

Vi limitens. vastery test select the correct answer. which statement explains why large atoms are more reactive than small atoms? a. large atoms have valence electrons farther from the nucleus and lose them more readily. b. large atoms have greater ionization energy, which they can utilize during a reaction. c. large atoms have a greater number of electrons that they can lose during a reaction. d. large atoms have more energy levels, so they have more energy to pass on in a reaction. reset next