CHEM CH1

What percentage of the air we breath is made up of 0₂?

21%
...the 4 elements in phosphoric acid:
- sodium
- chlorine
- oxygen
- phosphorus
...contains only one type of element or compound and has a fixed chemical composition:

pure substance
...physical state, color, viscosity, opacity, density, conductivity, mealting and boiling points:

physical properties
..the temperature at which a solid is converted to a liquid:

mealting point
...as energy is removed, the point of conversion of liquid to solid...

freezing point
...point of conversion of liquid to gas:

boiling point
is it possible to solidify helium?

no
substance made of 2 or more elements or compounds that have not reacted chemically:

mixture
...the physical and chemical properties of a mixture depend in the composition (proportions) of the mixture... T or F?

T
...# of SI base units:

7
Length/symbol

Meter/m
Mass/Symbol

Kilogram/kg
Time/Sym

Second/s
Electric current/sym

Amphere/A
Temperature/sym

Kelvin/K
Amount of Substance/sym

Mole/mol
Luminosity/sym

Candela/cd
Volume sym

m³
Density sym

kg/m³
Energy sym (word)

J (joule)
8 Common Metric Prefixes/abbr/factor in
- mega/M/10⁵
- kilo/k/10³
- deci/d/10^-1
- centi/c/10^-2
- milli/m/10^-3
- micro/u/10^-5
- nano/n/10^-9
- pico/p/10^-12

Author

purplerubycrystal

129368

Card Set

CHEM CH1

Description

CHEM CH1

Updated

2012-01-21T18:45:29Z

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