Chemistry 121

km → mile conversion
1 km = 2.56 miles
mile → foot conversion
1 mile = 5,280 feet
pound → gram conversion
1 pound = 453.6 grams
inch → centimeter conversion
1 inch = 2.54 cm
quart → liter conversion
1 quart = 0.946 L
precision vs. accuracy

precision-how closely one’s measurements agree with one another

;

accuracy-how closely one’s measurements agree with the actual value

Rules for multiplication and division of significant figures:
The answer contains the same number of significant figures as the measurement with the fewest number of significant figures
Rules for addition and subtraction of significant figures
Answer has the same number of decimal places as the measurement with the fewest decimal places
Rules for significant figures:

1. Zeros between non-zero digits are always significant

 

2. Zeros at the beginning of a number are never significant

 

3. Zeros at the end of a number are significant if the number contains a decimal point

Density
mass/volume
mL = ____?
cm3
Liter = _____?
dm3
Formula for volume of a cube:
(length)3
Formula for celcius → fahrenheit
F = 9/5 (celcius) + 32
Formula for fahrenheit → celcius
C = 5/9 (Fahrenheit-32)
Formula for celcius → Kelvin
K = celcius + 273.15
SI unit for luminous intensity
candela (cd)
SI unit for electric current
Ampere (A)
SI unit for the amount of a substance
mole (mol)
SI unit for temperature
Kelvin (K)
SI unit of time
second (s)
SI unit of length
meter (m)
SI unit of mass
kilogram (kg)
Giga-

abbreviation: G

meaning:109

Mega-

abbreviation: M

meaning: 106

Kilo-

abbreviation: k

meaning: 103

Deca-

abbreviation: dec

meaning: 101

Deci-

abbreviation: d

meaning: 10-1

Centi-

abbreviation: c

meaning: 10-2

Milli-

abbreviation: m

meaning: 10-3

Micro-

abbreviation: μ

meaning: 10-6

Nano-

abbreviation:n

meaning: 10-9

Pico-

abbreviation: p

meaning: 10-12

Femto-

abbreviation: f

meaning: 10-15

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