Chem 1001 Midterm Exam Potentially Useful Formulas
𝑑𝑒𝑛𝑠𝑖𝑡𝑦 =
𝑠𝑝𝑒𝑐𝑖𝑓𝑖𝑐 𝑔𝑟𝑎𝑣𝑖𝑡𝑦 =
𝑚𝑎𝑠𝑠
𝑣𝑜𝑙𝑢𝑚𝑒
𝑑𝑒𝑛𝑠𝑖𝑡𝑦 𝑜𝑓 𝑠𝑢𝑏𝑠𝑡𝑎𝑛𝑐𝑒
𝑑𝑒𝑛𝑠𝑖𝑡𝑦 𝑜𝑓 𝑤𝑎𝑡𝑒𝑟
T(K) = T(C) + 273
% 𝑎𝑐𝑡𝑖𝑣𝑒 𝑖𝑛𝑔𝑟𝑒𝑑𝑖𝑒𝑛𝑡 =
𝑚𝑎𝑠𝑠 𝑜𝑓 𝑎𝑐𝑡𝑖𝑣𝑒 𝑖𝑛𝑔𝑟𝑒𝑑𝑖𝑒𝑛𝑡
𝑥 100
𝑚𝑎𝑠𝑠 𝑜𝑓 𝑡𝑎𝑏𝑙𝑒𝑡
1 𝑛
𝑖𝑠𝑜𝑡𝑜𝑝𝑒 𝑟𝑒𝑚𝑎𝑖𝑛𝑖𝑛𝑔 = ( ) 𝑥 𝑠𝑡𝑎𝑟𝑡𝑖𝑛𝑔 𝑎𝑚𝑜𝑢𝑛𝑡
2
𝑤ℎ𝑒𝑟𝑒: 𝑛 =
𝑡𝑖𝑚𝑒 𝑒𝑙𝑎𝑝𝑠𝑒𝑑
ℎ𝑎𝑙𝑓𝑙𝑖𝑓𝑒
Geometry of Molecules
Number of Bonding Pairs
on the Central Atom
4
3
2
3
2
Number of Lone Pairs on
the Central Atom
0
1
2
0
0
Shape around the Central
Atom
tetrahedral
trigonal pyramidal
bent
trigonal planar
linear