Chemistry Chapter 3: Measurements

Flashcards covering measurements, units, and conversions in Chemistry Chapter 3.

Conversion factors

Where we have equal quantities but different units to allow conversion.

Measurements

All measurements require a number and the unit. Ex: 5m = 5 meters

SI units

International system of units.

Length

How long, wide, high, tall but it's 1 dimensional. Unit = meters (m)

Mass

The amount of matter you have; unit is Kilogram (kg).

Volume

The amount of space occupied; unit is cubic meter (m3)

Density

How much matter do I have in this amount of space; unit=g/cm3 (grams per cubic centimeter ) or (grams per milliliter).

Temperature

How hot or cold. In Science det. Average Kinetic energy. Unit = Kelvin (k)

Conversion Scale

K = °C +273

Energy

Overall Kinetic & Potential Energy; Unit Joule (J)

Mega (M)

10^6

Kilo (k)

10^3 = 1000

Hecto (h)

10^2 = 100

Deka (dk)

10^1 or simply 10

deci(d)

10^-1

Centi (c)

10^-2

Milli (m)

10^-3

micro (u)

10^-6

nano (n)

10^-9

Angstrom (Å)

10^-10

Conversion

Converting from 1 unit to another.

Dimensional Analysis

Can be a multistep process; show work!

Prefix Conversions

The largest unit always = 1 for prefix conversions.