Chemistry - Unit 1

Density Formula

• M - Mass | V - Volume | D - Density
• D = M / V
• V = M / D
• M = D x V

"King Henry" Metric Conversions

• 1000 - Kilo - Large
• 100 - Hecto
• 10 - Deka
• 1 - Base - Meters / Grams / Liters / Seconds
• 1/10 - 0.1 - Deci
• 1/100 - 0.01 - Centi
• 1/1000 - 0.001 - Milli - Small

Dimensional Analysis

• Unit you want/Unit you cancel
• 
• Bildunterschrift: Dimensional Analysis Example

Significant Figures

• Rule #1
• All non-zero digits are always significant
• 274 = 3 significant figure / digits
• 25.632 = 5 significant figure / digits
• 8.987 = 4 significant figures / digits
• Rule #2
• All zeros between significant digits are always significant
• 504 = 3 significant figures / digits
• 60002 = 5 significant figures / digits
• 9.077 = 4 significant figures / digits

Significant Figures (continued)

• Rule #3
• All final zeros to right of the decimal are significant
• 32.0 = 3 significant figures / digits
• 19.000 = 5 significant figures / digits
• 105.0020 = 7 significant figures / digits
• Rule #4
• All zeros that act as place holders are not significant
• Another way to say this is: zeros are only significant digits or are the very final thing at the end of the decimal
• 0.0002 = 1 significant figure / digit
• 6.02 x 10^23 = 3 significant figures / digits
• 100.000 = 6 significant figures / digits
• 150000 = 2 significant figures / digits
• 800 = 1 significant figure / digit