5 Steps to a 5: AP Chemistry 2020 - Moore J.T., Langley R.H. 2020
Appendixes
SI Units
SI Prefixes
SI Base Units and SI/English Conversions
Length
The base unit for length in the SI system is the meter.
1 kilometer (km) = 0.62 mile (mi)
1 mile (mi) = 1.61 kilometers (km)
1 yard (yd) = 0.914 meters (m)
1 inch (in) = 2.54 centimeters (cm)
Mass
The base unit for mass in the SI system is the kilogram (kg).
1 pound (lb) = 454 grams (g)
1 metric ton (t) = 103 kg
Volume
The unit for volume in the SI system is the cubic meter (m3).
1 dm3 = 1 liter (L) = 1.057 quarts (qt)
1 milliliter (mL) = 1 cubic centimeter (cm3)
1 quart (qt) = 0.946 liters (L)
1 fluid ounce (fl oz) = 29.6 milliliters (mL)
1 gallon (gal) = 3.78 liters (L)
Temperature
The base unit for temperature in the SI system is kelvin (K).
Celsius to Fahrenheit: °F = (9/5)°C + 32
Fahrenheit to Celsius: °C = (5/9)(°F − 32)
Celsius to kelvin: K = °C + 273.15
Pressure
The unit for pressure in the SI system is the pascal (Pa).
1 millimeter of mercury (mm Hg) = 1 torr
1 Pa = 1 N/m2 = 1 kg/m s2
1 atm = 1.01325 × 105 Pa = 760 torr
1 bar = 1 × 105 Pa
Energy
The unit for energy in the SI system is the joule (J).
1 J = 1 kg m2/s2 = 1 coulomb volt
1 calorie (cal) = 4.184 joules (J)
1 food Calorie (Cal) = 1 kilocalorie (kcal) = 4,184 joules (J)
1 British thermal unit (BTU) = 252 calories (cal) = 1,053 joules (J)