Ideal Gas Equation
Caution: Units, STP
L atm/mol K
m3 P a/mol K
L torr/mol K
Table 1: Numerical values of the Gas Constant R.
STP: 273.15K, 1atm
a) Match the following O-O bonds lengths for O 2, KO2, BaO2, O2[AsF6] and write out the bond
order for these molecules.
1. Melamine, a slightly toxic gas (520K), is 28.6% C and 66.7% N by
mass. At 500oC and 720torr, 3.764g of melamine occupies
2.000L. (a) What is the molecular formula of melamine? (b) its
molecular structure and (c) its polarity.
(a) To det
1. Add 500mL 0.10 mol L-1 NaOH solution to 1.0L 0.10 mol L -1 NaH2PO4 solution. (a) Calculate for
pH for this mixed solution. (b) Then we add 500mL 0.10 mol L -1 MgCl2 solution to this mixed
solution, is there any precipitate Mg(OH)2 formed? (Show