FORMULAS FOR CHM 101
𝐷=
𝑚
𝑣
1 kg = 2.20 lb
TF = 1.8TC + 32
1 min = 60 sec
TK = TC + 273
𝑃1
𝑇1
𝑉1
𝑛1
=
=
1 km = 0.621 mi
𝑉1
P1V1 = P2V2
𝑇1
=
𝑃2
𝑃1𝑉1
𝑇2
𝑇1
𝑉2
1 day = 24 h
1 inch = 2.54 cm
𝑉2
𝑇2
=
𝑃2𝑉2
𝑇2
K = °C + 273
𝑛2
1 h = 60 min
TF = 1.8TC + 32
1 mole of gas = 22.4L at STP
PT = P1 + P2 + P3 + ....
1 atmospheric pressure (1 atm)
= 760 millimeters of mercury (760 mmHg)
= 760 Torr
= 29.9 inches of mercury (29.9 in. Hg)
= 101 325 Pascal (101 325 Pa)
= 101.325 kilopascal (101.325 kPa)
= 14.7 pounds per square inch (14.7 lb/in.² or 14.7 psi)
Solubility Rules:
1. Most nitrate (NO3-) salts are soluble.
2. Most alkali metal (group 1A) salts and NH4+ are soluble.

+
2+
2+
3. Most Cl-, Br-, and I- salts are soluble (except Ag , Pb , Hg ).
2
4. Most sulfate salts are soluble (except BaSO , PbSO , Hg SO , CaSO ).
4
4
2
4
4

5. Most OH are only slightly soluble (NaOH, KOH are soluble, Ba(OH)2, Ca(OH)2 are marginally
soluble).
2
2
2
3
6. Most S , CO , CrO , PO
3
4
salts are only slightly soluble, except for those containing the
4
cations in Rule 2.
Slightly, marginally, form precipitates in solution
Mass/ mass % = mass solute / mass solution X 100%
Mass / volume % = mass solute / volume of solution X 100%
Volume /volume % = volume solute / volume solution X 100%
Molarity = moles solute / Liters of solution