Chapter 10 Flashcards
(20 cards)
“Atom are neither created nor destroyed in a chemical reaction” is a statement
Law of definite proportions
Law of conservation of mass
Law of percent composition
atomic theory
Law of conservation of mass
A balanced chemical equation has
the same number of molecules on both sides of the equation
the same kinds of molecules on both sides of the equation
the same number of each kind of atom on both sides of the equation
all of the above
the same number of molecules on both sides of the equation
A material the speeds up a chemical reaction without being permanently changed by the reaction is a
active metal
reactant
product
catalyst
catalyst
A solid that comes out of solution as a result of an ion exchange reaction is called a
precipitate
contaminant
base
metal
precipitate
An empirical formula does not
identify elements in a compound
identify actual numbers of atoms in a molecule
provide the simplest whole number ratio of atom elements with subscripts
provide the formula for an ionic compound
provide the formula for an ionic compound
Any substance that contains Avogadro’s number of particles is call a (an)
mole
atomic number
gopher
pound
mole
The molecular weight of sulfuric acid, H2SO4 is
49u
50u
98u
194u
98u
The most active metals are found in group
IA
IIA
IB
IIB
IA
The number of atoms in exactly 12.00g of C-12 is called
atomic number
atomic weight
Avogadro’s number
molecular number
Avogadro’s number
The relative arrangement of the atoms in a molecule is a (an)
empirical formula
structural formula
molecular formula
covalent formula
structural formula
The sum of the atomic weight of all atoms in the ammonia molecule, NH3 is called
molecular weight
gravity weight
periodic weight
percent weight
molecular weight
To what chemical reaction class does this reaction belong 2mg(s) + O2(g) - MgO(s)
Combination
Ion exchange
Decomposition
Replacement
Combination
To what chemical reaction class does this reaction belong
Combination
Ion exchange
Decomposition
Replacement
Decomposition
What are the coefficient needed to balance this chemical equation
1212
2121
1112
2111
1212
What is the formula weight of acetic CH3COOH which is found in vinegar
29u
48u
58u
60u
60u
What is the meaning of the subscript in a chemical formula
Number of atoms of an element in a compound
Percent compostition of the element in a compound
Number of molecules of that compound
Number of molecules in the reaction
Number of atoms of an element in a compound
What products are formed from the complete reaction of hydrocarbons or carbohydrates with oxegen
ch4 + co2
co + h2o
co2 + h2o
co2 + h2
co2 + h2o
Which is the most active metal
silver
lead
zinc
sodium
sodium
You know that an expected ion exchange reaction has taken place if the products include
a precipitate
a gas
water
any of the above
any of the above
