ch.1 and e Flashcards
conversion: how many joules (J) per calorie (cal)
4184J/cal
conversion: how many centimeters (cm) per inch (in)
2.54 cm/in
conversions: how many milliliters (mL) per centimeters cubed (cm^3)
1 mL/cm^3
milli
10^-3
centi
10^-2
deci
10^-1
nano
10^-9
micro or weird u
10^-6
kilo
10^3
conversions: how many kilojoules (kJ) per kilowatthr (kWh)
3600 kJ/kW*h
scientific law
chemist generates similar observations by experiments that leads to the development of a scientific law, that summarizes past observations and predicts future ones
Which concept was demonstrated by Rutherford’s gold foil experiment?
Atom’s mass is concentrated in a very small space.
Pure substances
do not have a variable composition and contain only a single component, either an element or a molecule
mixture
have a variable composition and contain two or more different components
Elements
cannot be broken down into simpler substances
compounds
can be broken down into simpler substances and contain more than one element
homogeneous mixture
is composed of two types of particles that are dispersed uniform
heterogeneous
is composed of two types of particles that are located separately
law of conservation of mass
states that matter is neither created nor destroyed in a chemical reaction
mass number (A)
protons (Z) +neutrons
atomic number (Z)
of protons
atomic symbol
mass number (A) on top left, atomic number (Z) on bottom left, and chemical symbol (X) on right
Conversion: how many feet (ft) per mile
5280 ft/mile
