Chem 111 Quiz 1

SI Units
____ --> Meter,m.
Mass --> ____
Temp --> ____
Time --> _____
- length
- kilogram, kg
- kelvin, k
- second, s
____ : std quantities to specify a measurment.

Units
Enery: _________

Capacity to do work
_____: force acting over a distance

Work
Density
formula:
given in units of:
1___=1___
- mass/volume
- g/mL or g/cm³ or kg/L³
- mL, cm³
SI Prefixes
giga 10^?___ 10⁶___ 10³Deci 10^?Centi 10^?____ 10^?____ 10^-6Nano 10^?____ 10^-12

9, mega, kilo, -1, -2, mili -3, micro, -9, pico
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
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
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
Trailing zeros ____ a decimal are always significant.
Trailing zeros ____ a decimal are ambiguous.
- after
- before
Physcial Change: ___________
Chemical Change: __________
- appearence changes but not composition.
- chemical composition of the compound is altered.
Matter:

is composed of atoms.
Molecule:

2 joined atoms
What are atoms?

The building blocks of matter
What is chemistry? the study of

matter, its properties and interactions

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tbby5065

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Chem 111 Quiz 1

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Chem 111

Updated

2011-01-27T01:48:01Z

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