Chem chapter 1
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Chem chapter 1
molecules stop moving at?
3 classifications of matter?
substances that cannot be broken down into simpler substances by chemical reactions are called
substances that can be decomposed are called
compounds are composed of molecules that?
contain two or more different kinds of atoms
elements are the?
basic building blocks of matter
composed of single type of atom
elements ___ be broken down, compounds ___
made of one type of atom
___ are made up of different types of particles.
not uniform throughout?
example of homogeneous mixture?
tea w/dissolved sugar
example of heterogeneous mixture?
salt at bottom of water
a characteristic that can be measured without changing the identity of the substance
example of physical property?
indicates how a substance reacts with something else
examples of chemical property?
gasoline burns in air
nitric acid reacts with sodium hydroxide
a physical property give _____ while a chemical property ___
info about it, not what it does
tells you how it reacts
in a ______ _____, the original substance still exists, but it has changed in form
example of physical change
in a ____ ___, a new substance is produced
examples of chemical change
sodium metal reacts with water
butane combusts in air
ice melting is a?
cooking, heating, burning are all?
described by words
characterized by numbers
refers to how close a measurement comes to a true or accepted value
refers to how close multiple measurement of the same quantity come to each other
digit of uncertainty is ?
the last number
in multiplication/division the number of sig figs are determined by?
the number with the lowest # of sig figs
formula to convert Celsius to kelvin
K= C + 273
mass is to ?
volume is to ?
length is to ?
time is to ?
1 kilo - _____ = 1000
1 mega = 10
12 in =
1 gallon =
16 ounces =