Dimensional Analysis and Conversion Factors

​Dimensional Analysis and Conversion Factors - Review

This is a review of Chapter 2.2 ​

​SI Units

​In this class you are to remember each SI Units Quantity, Symbol, Unit, and Abbreviation.

Multiple Choice

The abbreviation for mass if

• g

• kg

• m

• mol

Multiple Choice

the amount of substance = _

• mole

• length

• luminous intensity

• thermodynamic temperature

1. Length = meters (m)

2. mass = grams (g)

3. time = seconds (s)

4. ​Volume = Liter (L)

5. amount of substance = mole (mol)​

​Base Units used in chemistry

​

• ​Conversion factors are used to convert from one unit to another.

• ​A unit prefix is placed in front of a base unit to indicate a multiple of any measurement.

​Prefixes & Conversion Factors

​Units that get smaller

​Units that get larger

​Common Conversion Factors

​Units that get smaller

​Units that get smaller

Multiple Choice

What is the symbol for kilo?

• c

• m

• K

• $$\mu$$  

Draw

What are the two potential conversion factors we can use when converting between grams (g) and kilograms (Kg)?

Draw

What are the two potential conversion factors we can use when converting between meters (m) and millimeters (mm)?

Multiple Choice

What is the symbol for micro?

• c

• m

• K

• $$\mu$$  

Draw

What are the two potential conversion factors we can use when converting between seconds (s) and microseconds $$\left(\mu s\right)$$  ?

Draw

What are the two potential conversion factors we can use when converting between moles (mol) and centimoles (cmol)?

​Dimensional Analysis

​A mathematical technique that allows you to use units to solve problems involving measurements. It uses conversion factors.

Multiple Choice

to convert 0.5674 m to km, which conversion factor should we use?

• $$\frac{1000\ m}{1\ km}$$  

• $$\frac{1\ km}{1000\ m}$$  

• $$\frac{1000\ km}{1\ m}$$  

• $$\frac{1\ m}{1000\ km}$$  

Draw

Set up a dimensional analysis equation that converts 9000 m to km.

Multiple Choice

Convert 9000 m to km.

• 9 000 000

• 9

• 9 000 000 km

• 9 km

Multiple Choice

to convert 0.005 cm to m, which conversion factor should we use?

• $$\frac{100\ cm}{1\ m}$$  

• $$\frac{1\ cm}{100\ m}$$  

• $$\frac{100\ m}{1\ cm}$$  

• $$\frac{1\ m}{100\ cm}$$  

Multiple Choice

to convert 1 L to mL, which conversion factor should we use?

• $$\frac{1000\ L}{1\ mL}$$  

• $$\frac{1\ mL}{1000\ L}$$  

• $$\frac{1000\ mL}{1\ L}$$  

• $$\frac{1\ L}{1000\ mL}$$  

Draw

Set up a dimensional analysis equation that converts 38 m to cm.

Multiple Choice

Convert 38 m to cm.

• 0.038 cm

• 3800 cm

• 38 000 cm

• 0.38 cm

Multiple Choice

to convert 36.52 $$\mu mol$$  to mol, which conversion factor should we use?

•   $$\frac{1\ 000\ 000\ \mu mol}{1\ mol}$$  

•   $$\frac{1\ mol}{1\ 000\ 000\ \mu mol}$$  

•   $$\frac{1\ 000\ 000\ mol}{1\ \mu mol}$$  

•   $$\frac{1\ \mu mol}{1\ 000\ 000\ mol}$$  

Draw

Set up a dimensional analysis equation that converts 936.52 $$\mu mol$$   to mol.

Multiple Choice

Convert 36.52 $$\mu mol$$  to mol.

• 36 520 mol

• 36 520 000 mol

• 0.00003652 mol

• 0.03652 mol