CHEM 6A Study Guide - Quiz Guide: Chemical Equation

• School: UCSD
• Department: Chemistry and Biochemistry
• Course: CHEM 6A
• Professor: Thomas Bussey

Document Summary

A: find molar mass on periodic table; given to you: you should be able to take the chemical formula of a compound and use that information and information from the periodic table to calculate the percent composition of a compound. Divide all the moles by the smallest number to determine the ratio and multiply until you get close to all whole numbers: you should be able to use a periodic table, an empirical formula, and a compound"s molecular weight (or molar mass) in order to determine the compound"s molecular formula. Increases down a group because more energy levels added and more electrons added, so more electron repulsion/more shielding, less effective nuclear charge, so attraction between protons and outermost electrons is weaker. Electron affinity: the energy change when an electron is added to a gaseous atom. You should be able to write the chemical equation corresponding to the ionization energy of an atom.