Balancing Equations Question Preview (ID: 11389)


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What combinations of atoms are involved in this compound? KCl
a) 1 potassium atom and 2 chlorine atoms
b) 2 potassium atoms and 1 chlorine atom
c) 1 potassium atom and 1 chlorine atom
d) 2 potassium atoms and 2 chlorine atoms

What coefficient values will balance this reaction? H2+O2-->H2O
a) 1,2,1
b) 2,2,3
c) 2,2,2
d) 2,1,2

What coefficient values will balance the reaction? Al + O2 --> Al2O3
a) 1,3,1
b) 4,3,2
c) 2,1,1
d) 1,3,2

How does a balanced equation support the Law of Conservation of Matter?
a) A balanced equation shows the same mass on both sides
b) A balanced equation shows the same amount of subatomic particles on both sides
c) A balanced equation show the same amount of energy on both sides
d) A balanced equation shows the same number of atoms on both sides

Which part of this equation represents the reactants? 2NH3+4O2 --> 2NO + 3H2O
a) 2NH3
b) 2NO
c) 2NO + 3H2O
d) 2NH3+4O2

Which part of this equation represents the products? 2NH3+4O2 --> 2NO + 3H2O
a) 2NH3+4O2
b) 2NO
c) 2NO + 3H2O
d) 4O2

In a chemical equation, what name does the left side have?
a) sum
b) reactants
c) products
d) yield

How does the law of conservation of matter apply to chemical equations?
a) The sum of the coefficients on each side of the equation must be the same.
b) The total number of atoms of each element on both sides of the equation must be the same.
c) The sum of the atomic numbers on both sides of the equation must be the same.
d) The sum of the atomic masses on both sides of the equation must be the same.

In a chemical equation, what name does the right side have?
a) sum
b) reactants
c) products
d) yield

What is a coefficient in a chemical equation?
a) the subscript after an atomic symbol
b) a number preceding an elemental or molecular symbol
c) a number following an elemental or molecular symbol
d) a subscript before an atomic symbol

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