R = .08
Conversions
• Pressure:
1 ATM = 760 torr = 760 mmHg
• Energy (Heat):
1 Calorie = 1000 calories = 4000 joules
• Temperature:
0°C = 273 Kelvin
25°C = 298 K
Facts to Know
• To find the mass of a mole of a substance, multiply the formula weight
by the number of moles.
• 1 mol of gas at STP occupies 22.4 L of volume.
Solubility
• All alkali and ammonium (NH 4 +) compounds are soluble. The alkali
metals are included in group IA (Li+, NA+, K+, Rb+, Cs+).
• All acetates (CH 3 COO−), chlorates (ClO 3 −), nitrates (NO 3 −), and
perchlorates (ClO 4 −) are soluble.
• Pbn+, Hgn+, and Agn+ salts are insoluble, unless they are paired with one
of the anions from the previous rule.
