Intro to Chem Flashcards
What are the two worldviews of chemistry? How do they differ? Which one will we focus on mainly during this course (!!) ?
Macroscopic Chemistry Worldview: objects we can see/touch/deal with daily
!! Microscopic Chemistry Worldview: atoms; molecules
What are the two components of chemistry?
(nature of) Matter and Energy
Name four types of scientific methods
- Hypothesis: formulate to provide tentative explanation of facts
- Observation and Experiment: observations made and info collected
- Law: large amount of data related to a certain phenomenon that have been collected
- Theory: unifying principle that explains large body of facts
What are 6 ideas the word “chemistry” can be applied to?
CRAP FN
- Combustion
- Rusting
- Absorption/Emission of Energy
- Phase Changes (ex: liquid -> solid -> gas)
- Formation of Atom Molecules
- Nuclear Reactors (ex: bombs)
Chemistry is the study of _______
change
Chemistry is related to:
A) Bio
B) Physics
C) Geology
D) Nuclear Energy
E) All of the above
E) All of the above
The principles of chemistry can be used to describe what 3 things/concepts?
The principles of chemistry are used to:
- Describe what changed
- Describe what happened to cause this change
- Describe why the sample has exhibited a specific change
To avoid confusion with units, scientist agreed on a standard set of units. These standards are called the…
System Internationales (International System of Units)
Name a few examples of the units used under the System Internationales
Kg (mass)
m (length)
K (temp)
s (time)
L (volume)
How many grams are in 1kg?
1 kg = 1000g (base unit)
How many centimeters are in 1 meter?
1m = 100cm
How many millimeters are in 1 meter?
1 meter = 1000mm
How many micrometers are in 1 meter?
1 meter = 10⁻⁶ (1,000,000) µm
How many millimeters are in 1cm?
1cm = 10mm
How many mL are there in 1cm³?
1cm³ = 1mL
Understand conversions within the metric system
1. Convert 5.2kg to grams
2. Convert 25,000g to kg
3. Convert 70cm to m
4. Convert 8m to mm
5. Convert 49 cm to mm
6. Convert 6L to mL
7. Convert 576 cm³ ro mL
FOR EXTRA PRACTICE, WORK ON ASSIGNMENT 1.2
- 5200g
- 25kg
- 0.7m
- 8000mm
- 490mm
- 6000mL
- 576mL
Understand scientific notation
Convert each of the numbers form scientific notation to real:
1. 5.7067 x 10⁸
2. 7.1421 x 10⁰
3. 3.164 x 10¹
4. 7.3847 x 10⁻⁸
Convert each of the numbers from real to scientific notation:
5. 0.023862
6. 8,895.8
7. 26.617
FOR EXTRA PRACTICE, WORK ON ASSIGMENT 1.1
- 570,670,000
- 7.1421
- 31.64
- 0.000000073847
- 2.3862 x 10⁻²
- 8.8958 x 10³
- 2.6617 x 10¹