Discussion:
Assorted General Chemistry Problems
1) In a combustion analysis, 2.00mg of vitamin C yielded 3.00mg CO2 and 0.816mg H2O. From mass spectrometry, it was found that the molecular weight of vitamin C is 176amu. Determine the mass composition of vitamin C, its empirical formula, and its molecular formula.
2) What is the energy of the photon that is emitted when the state of an electron changes from n=4 to n=2, in a hydrogen atom?
3) What is the name of each of the three quantum numbers used to describe orbitals in atoms? What orbital characteristics does each quantum number describe? What are the limitations on the values of these quantum numbers?
4) The following table gaves the first ionization energies for the noble gas elements. Using electron configurations, explain why the first ionization energy decreases with increasing atomic number.
Element: He (2377kJ/mol), Ne (2088kJ/mol), Ar (1527kJ/mol),
Kr (1356kJ/mol), Xe (1176 kJ/mol), Rn (1042kJ/mol