Msu Cem 141 Exam 2 Summary

Hund's Rule {Ans: electrons occupy orbitals of the same energy singly (they don't pair up until they have to)}When and where were the carbon and oxygen atoms in your body created? {Ans: Within stars and stellar explosions}What is the percent yield of the reaction if 32.8 g of MTBE is obtained from reaction of 26.3 g of isobutylene with sufficient methanol? What is the Percent Yield? {Ans: 41.3 g C5H12O 79.4%}Frequency (v) {Ans: - number of wavefronts per second - measured in (Hz=s^-1)}Iodine exists as molecules of I2 and silicon dioxide exists as an extended network of Silicon-oxygen bonds (similar to diamond). They both are solids at room temperature, but which do you think has the higher melting point and why? {Ans: Silicon dioxide because to melt it you would have to break covalent bonds.}CH4 + 2O2 ----> 2H2O +CO2 How many molecules of O2 will remain at the end? {Ans: 3}Wavelength (h) {Ans: - the distance from peak to peak - measured in (m)}How does the existence of atoms help explain the conversion of matter? {Ans: The existence of atoms shows that matter is conserved because the reaction has to be