Chemistry- Chapter 8
Which coefficients correctly balance the formula CaO + H₂O -> Ca(OH)₂
1-1-1
Which coefficients correctly balance the formula equation CaCO₃(s) -> CaO(s) + CO₂(g)
1-1-1
Which coefficients correctly balance the formula NH₄NO₂ -> N₂ + H₂O
1-1-2
Which coefficients correctly balance Zn(OH)₂ + CH₃COOH -> Zn(CH₃COO)₂ + H₂O
1-2-1-2
What is the balanced equation when aluminum reacts with copper(II) sulfate?
2Al + 2CuSO₄ -> Al₂(SO₄)₃ + 3Cu 2-3-1-3
The word equation, solid carbon + oxygen gas -> carbon dioxide gas + energy, represents a chemical reaction because...
CO₂ has chemical properties that differ from those of C and O
A reaction of a hydrocarbon in which carbon dioxide and water are produced, is classified as a
Combustion reaction
The reaction, C₂H₅OH + 3O₂ -heat-> 2CO₂ + 3H₂O, will occur most rapidly if..
C₂H₅OH and O₂ are in close contact
How would oxygen be represented in the formula equation for the reaction of methane and oxygen to yield carbon dioxide and water?
O₂
After the first steps in writing an equation, the equation is balanced by...
adjusting the coefficients to the smallest whole-number ratio
The products of the reaction, C₂H₅OH + 3O₂ -> 2CO₂ + 3H₂O, have the same ________ as the reactants.
atoms
Which observation does not indicate that a chemical reaction has occurred?
change in total mass of substances
To balance a chemical equation, it may be necessary to adjust the ...
coefficients
Which is not balanced? a.) 2H₂ + O₂ -> 2H₂O b.) 4H₂ + 2O₂ -> 4H₂O c.) H₂ + H₂ + O₂ -> H₂O + H₂O d.) 2H₂ + O₂ -> H₂O
d
The reaction 2KClO₃(s) -> 2KCl(s) + 3O₂(g) is a
decomposition
In what kind of reaction does a single compound produce 2 or more simpler substances
decomposition reaction
A + BX -> AX + B is the general equation for a
displacement
In what kind of reaction does one element replace a similar element in a compound
displacement
The word equation for C₂H₅OH + O₂ -> CO₂ + H₂O + energy is...
ethanol + oxygen -> carbon dioxide + water + energy
After the correct formula for a reaction in an equation has been written, the ...
formula should not be changed
Knowledge about what products are produced in a chemical reaction is obtained by...
laboratory analysis
An insoluble solid produced by a chemical reaction in a solution is called a..
precipitate
In the unbalanced formula equation, CO + O₂ -> CO₂ + energy, energy is...
released
A chemical reaction has not occurred if the products have..
same chemical properties as the reactants
A chemical equation is balanced when the ...
same number of each kind of atom appears in the reactants and products
The state of matter for a reactant or a product in a chemical equation is indicated by a...
symbol after the formula
A + X -> AX is the general equation for a _________ reaction
synthesis
What kind of reaction do 2 or more substances combine to form a new compound
synthesis
