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52 Cards in this Set
- Front
- Back
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5 branches of chemistry
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organic chemistry
biochemistry analytical chemistry inorganic chemistry physical chemistry |
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what links all 5 types of chemistry?
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all chemists study at heart electrical phenomena on length scales of about 10x10(-8)
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cgs force equation
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(grams x centimeters)/(seconds square)
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cgs energy equation
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(grams x centimeters square)/(seconds square)
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mks force equation
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(kilograms x meters)/(seconds square)
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mks energy equation
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(kilograms x meters square)/(seconds square)
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dyne
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cgs abbreviation for force
equal to about the amount of force that one hand can push |
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joule
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mks abbreviation for kinetic energy
equal to about 1 heart beat |
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newton
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mks abbreviation for force
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pressure
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mks for (force)/(area)
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pascal
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mks for ((kilograms x meters)/(seconds square))/meters square
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erg
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cgs abbreviation for force
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tera
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10 x 10(+12)
times 1,000,000,000,000 |
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giga
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10 x 10(+9)
times 1,000,000,000 |
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mega
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10 x 10(+6)
times 1,000,000 |
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kilo
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10 x 10(+3)
times 1,000 |
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centi
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10 x 10(-2)
times .01 |
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milli
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10 x 10(-3)
times .001 |
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micro
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10 x 10(-6)
times .000001 |
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nano
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10 x 10(-9)
times .000000001 |
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pico
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10 x 10(-12)
times .000000000001 |
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extensive
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amount based on size of system
ex: volume, mass, energy if you divide one extensive property by another, it will yeild an intensive property |
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intensive
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values don't depend on size of system
ex: temperature, pressure, density |
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steps to solving problems
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-identify the QUESTION
-identify the EXPRESSION -apply CONVERSION FACTORS -CANCEL where appropriate -double CHECK -SOLVE |
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proton mass
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1.67 x 10(-24) grams
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proton charge
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1.6 x 10(-14) coulombs
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neutron mass
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1.67 x 10(-24) grams
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neutron charge
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NONE
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electron mass
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9.1 x 10(-28) grams
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electron charge
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-1.6 x 10(-19) coulombs
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strong force
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-glues protons and neutrons into the core of the atom
-overcomes repulsions of protons to one another -only effective over tiny distances (core of the atom only) |
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density
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(mass)/(volume)
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typical density of atom
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(1.67 x 10(-24) grams)/(10(-24) centimeters cubed)
very small compared to density of nucleus |
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finding mass of atoms
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((#protons + #neutrons)(1.67 x 10(-24))+((#electrons)(9.1 x 10(-28))
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mole
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6.02 x 10(+23)
can be applied to any unit also called Avogadro's number |
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atomic mass unit
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1.66056 x 10(-24) grams
about the weight of a proton or neutron |
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elemental glue
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attraction between positive and negative charges
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static charge carried by a cgs proton
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4.8 x 10(-10)
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static charge carried by a cgs electron
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-4.8 x 10(-10)
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finding force in dynes
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((4.8 x 10(-10)x(-4.8 x 10(-10))/(distance square)
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empirical formula
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simplest form of a formula
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density
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(mass)/(volume)
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typical density of atom
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(1.67 x 10(-24) grams)/(10(-24) centimeters cubed)
very small compared to density of nucleus |
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finding mass of atoms
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((#protons + #neutrons)(1.67 x 10(-24))+((#electrons)(9.1 x 10(-28))
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mole
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6.02 x 10(+23)
can be applied to any unit also called Avogadro's number |
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atomic mass unit
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1.66056 x 10(-24) grams
about the weight of a proton or neutron |
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elemental glue
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attraction between positive and negative charges
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static charge carried by a cgs proton
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4.8 x 10(-10)
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static charge carried by a cgs electron
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-4.8 x 10(-10)
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finding force in dynes
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((4.8 x 10(-10)x(-4.8 x 10(-10))/(distance square)
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empirical formula
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simplest form of a formula
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molucular formula
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may not be simplest form of a formula
found when figuring out what makes up a sample |
