a. Since the balanced chemical equation for the reaction is 2H2 + O2 2H2O, in order to
form the water, you need two molecules of hydrogen for every one molecule of oxygen.
Given the quantities of reactants present in the container (12 H2 molecules an
Quantities in Chemical Reactions Review Package
n = moles m = grams, M= molar mass
N = number of molecules, atoms
NA = Avogadros constant
All non-zero digits are significant
Leading zeros are not significant, lagg
The isotope of atom A is the atom with 32 protons, atom B; the atom that has the same mass number as
atom A (71) is atom D.
Each isotope of lithium (atomic number 3) has three protons. The neutral atoms will also each have
three electrons. The n