Chemistry- Chapter 8

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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


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