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SI Units
____ --> Meter,m.
Mass --> ____
Temp --> ____
Time --> _____
- length
- kilogram, kg
- kelvin, k
- second, s
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____ : std quantities to specify a measurment.
Units
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Enery: _________
Capacity to do work
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_____: force acting over a distance
Work
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Density
formula:
given in units of:
1___=1___
- mass/volume
- g/mL or g/cm3 or kg/L3
- mL, cm3
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SI Prefixes
giga 10?
___ 106
___ 103
Deci 10?
Centi 10?
____ 10?
____ 10-6
Nano 10?
____ 10-12
9, mega, kilo, -1, -2, mili -3, micro, -9, pico
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Unit Conversions
1 lb= ___ g
1 kg= ___ lb
1 oz= ___ g
1 in= ___ cm
1 gal= ___ L
1 cm3= ___ mL
- 453.6g
- 2.205 lb
- 28.35 g
- 2.54 cm
- 3.785 L
- 1 mL
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Correct # Sig Figs:
1. 0.04550 m
2. 61200 m
3. 3.0014 km
4. 10 dm=1m
5. 3.000x10-5s
- 1. 0.04550 m
- 2. 6.12x104m
- 3. 3.0014
- 4. none b/c its a defined quantity
- 5. 3.000
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Sig Fig's in Calculations
_________: lowest # sig figs in calculation are in the answer.
Subtraction/addition: ________________.
- Multiplication/Division
- result is same as one w/ fewest # decimal places
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Trailing zeros ____ a decimal are always significant.
Trailing zeros ____ a decimal are ambiguous.
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Physcial Change: ___________
Chemical Change: __________
- appearence changes but not composition.
- chemical composition of the compound is altered.
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Matter:
is composed of atoms.
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What are atoms?
The building blocks of matter
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What is chemistry? the study of
matter, its properties and interactions
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