Chapter 3 Unit Systems and Dimensional Analysis

Question 1

Parts of a Measurement

Hint: there are three parts

Answer 1

1) a number saying amount of quantity measured
2) an error that produces uncertainty
3) a unit of measurement

Question 2

Si system of Units

Answer 2

particular choice of metric units adopted in the ‘60’s as a standard for making metric system measurements

Question 3

SI Base Units

Answer 3

one of seven SI units from which all other SI units can be derived.

Length-Meter
Mass-kilogram
Time- Second
Temperature- Kelvin
Amount of Substance - mole
Electric Current - ampere
Luminous Intensity -  candela

Question 4

Metric System Prefixes

Answer 4

Giga-  billion - 10^9
Mega - million - 10^6
Kilo - thousand - 10^3
deci - tenth - 10^ -1
centi - hundredth - 10^ -2
milli - thousandth - 10^ -3
micro - millionth - 10^ -6
nano - billionth - 10^ -9

Question 5

Chemistry SI Unit for Volume

Answer 5

liter

Question 6

Liter Equals

Answer 6

L = 1 cubic decimeter = 1000 cubic centimeters = 0.001 cubic dm

Question 7

Milliliter Equals

Answer 7

mL = 1 cubic com = 1.0 * 10^ -3 L

Question 8

Coversion Factor

Answer 8

a ratio that specifies how one unit of measurement relates to another

Question 9

Density

Answer 9

ratio of the mass of an object to the volume occupied by the object. When an oject has a lighter density than another, the lighter object will “float on the other”
D= m/v

Question 10

Equivalence Conversion Factor

Answer 10

ratio that converts one type of measurement into a different one. Density as an example

Question 11

Fahrenheit to Celcius

Answer 11

(5/9)(F - 32)

Question 12

Celcius to Fahrenheit

Answer 12

C*(9/5) - 32