Chem: Chapter 5
It is used to determine the number of atoms in a set
quantity of a substance
Average Mass
The most accurate method currently used to compare
the masses of atoms involves the use of the .... ....
mass spectrometer
Atoms are passed into a stream of high speed electrons
that convert them into positive ions
Mass Spectrometer
Ions are passed through a magnetic field
Mass Spectrometer
Accelerating ions create their own magnetic field,
resulting in a change in the path travelled
Mass Spectrometer
The .... is defined as the number equal to the number
of carbon atoms in exactly 12 grams of pure
Also called ..... .....
mole & avogadro's number
It is the mass of one mole of the compound measured in
grams
Traditionally called ..... ....
Molar Mass of a Compound & molecular weight
The simplest whole-number ratio of the various types of atoms in a compound
Empirical formula
The .... .... varies for molecules and ions
molecular formula
In a .... ....., the ..... are situated on the
left side of an arrow, and the .... are located on the
right
chemical equation & reactants & products
Symbol (s)
soild
symbol (L)
Liquid
Symbol (g)
Gas
symbol (aq)
aqueous solution
true or false about balanced chemical equations?
The number of molecules is conserved
False
true or false about balanced chemical equations?
The coefficients tell you how much of each substance you
have
False
true or false about balanced chemical equations?
Atoms are neither created nor destroyed
True
true or false about balanced chemical equations?
The coefficients indicate the mass ratios of the
substances used
False (mol ratios)
true or false about balanced chemical equations?
The sum of the coefficients on the reactant side equals the
sum of the coefficients on the product side
False
The reactant that is used the most, limiting the quantity of the product formed
Limiting Reactant
A .... ..... is one that possesses equivalent amounts of reactants that match the numbers in the balanced equation
stoichiometric mixture
The presence and quantity of the .... .... determines the amount of the product formed
limiting reactant
The .... ..... is the reactant that produces the smallest amount of the product
limiting reactant
.... .... is the highest quantity of product that can be obtained from a given amount of limiting reactant
Theoretical yield
.... .... is the actual amount obtained
Actual Yield