mod 1 chem final Flashcards
mixture
uniform throughout
if it is homogenous if it isnt heterogenesous
pure substance can it be simplified chemical
no then its an element
yes then it is a compound
PHYSICAL properties
density, color, odor,
hardness, melting and boiling
points, electrical conductivity
chemical properties
flammability, toxicity,
acidity, corrosiveness, reactivity
EXTENSIVE
dependent on the amount of matter
INTENSIVE
independent of the amount of matter
Accuracy
– how close a measurement is to a true or accepted value
Precision
– how close a measurement is to other measurements
1 inch
2.54 cm
1 m
100 cm
1 kg
1000 g
1 gal
3.7854 L
nano (n)
10^-9
micro (u)
10^-6
milli (m)
10^-3
centi (c)
10^-2
deci (d)
10^-1
kilo ( k)
10^3
theory
explaains why natural phenomena occurs
law
summarizes a set of observations about natural phenomena
both law and theory
base on hypotheses
can be used to make predictions
can be revised
