Chapter 14 Test
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Last updated about 5 years ago
50 questions
2
Which of the following is NOT a sign of a chemical reaction?
Which of the following is NOT a sign of a chemical reaction?
2
What causes chemical bonds in molecules to break?
What causes chemical bonds in molecules to break?
2
A calcium carbonate molecule has 1 calcium (Ca) atom, 3 oxygen (O) atoms, and 1 carbon (C) atom. Which of the following shows the chemical formula for calcium carbonate?
A calcium carbonate molecule has 1 calcium (Ca) atom, 3 oxygen (O) atoms, and 1 carbon (C) atom. Which of the following shows the chemical formula for calcium carbonate?
2
What is the charge of an ionic compound?
What is the charge of an ionic compound?
2
Which of the following uses coefficients correctly to balance the equation N2 + H2 ------> NH3 ?
Which of the following uses coefficients correctly to balance the equation N2 + H2 ------> NH3 ?
2
Which of the following states the law of conservation of mass?
Which of the following states the law of conservation of mass?
2
Nitrogen dioxide is a covalent compound. How many oxygen atoms are in a nitrogen dioxide molecule?
Nitrogen dioxide is a covalent compound. How many oxygen atoms are in a nitrogen dioxide molecule?
2
An ion is
An ion is
2
Which of the following will NOT increase the rate of a chemical reaction?
Which of the following will NOT increase the rate of a chemical reaction?
2
Which of the following chemical equations shows an endothermic reaction?
Which of the following chemical equations shows an endothermic reaction?
2
Which of the following is NOT an example of a chemical reaction?
Which of the following is NOT an example of a chemical reaction?
2
Which of the following phrases describes a catalyst?
Which of the following phrases describes a catalyst?
2
Which of the following examples shows where a coefficient is used correctly to balance the equation?
Which of the following examples shows where a coefficient is used correctly to balance the equation?
2
In which kind of chemical reaction do two or more substances combine to form one new compound?
In which kind of chemical reaction do two or more substances combine to form one new compound?
2
Which of the following is an example of a chemical reaction?
Which of the following is an example of a chemical reaction?
2
What is O2 an example of?
What is O2 an example of?
2
Which of the following equations is an example of a single-displacement reaction?
Which of the following equations is an example of a single-displacement reaction?
2
How can the rate of a reaction be increased?
How can the rate of a reaction be increased?
2
How can you be sure a chemical reaction is happening?
How can you be sure a chemical reaction is happening?
2
Which of the following is an example of a diatomic molecule?
Which of the following is an example of a diatomic molecule?
2
What does a prefix in a chemical formula represent in an element?
What does a prefix in a chemical formula represent in an element?
2
Which of the following usually increases the rate of a reaction?
Which of the following usually increases the rate of a reaction?
2
Which of the following chemical reactions illustrates a decomposition reaction?
Which of the following chemical reactions illustrates a decomposition reaction?
2
Which of the following chemical reactions illustrates an endothermic reaction?
Which of the following chemical reactions illustrates an endothermic reaction?
2
Which of the following is an example of chemical bonds breaking?
Which of the following is an example of chemical bonds breaking?
2
A(n) ____________________ is used to balance chemical equations.
A(n) ____________________ is used to balance chemical equations.
2
The number that cannot change to balance a chemical equation is the ______________________.
The number that cannot change to balance a chemical equation is the ______________________.
2
If an energy diagram shows products at a lower energy than the reactants, the diagram shows an ___________________ reaction.
If an energy diagram shows products at a lower energy than the reactants, the diagram shows an ___________________ reaction.
2
In a double-displacement reaction, _______________________ from two compounds exchange places.
In a double-displacement reaction, _______________________ from two compounds exchange places.
2
Energy released in exothermic reactions was first stored in chemical bonds in the ___________________________.
Energy released in exothermic reactions was first stored in chemical bonds in the ___________________________.
2
Paper will burn at 451o F. For this chemical reaction to begin, 451oF is the _____________________________.
Paper will burn at 451o F. For this chemical reaction to begin, 451oF is the _____________________________.
2
A shorthand notation that represents a compound or diatomic molecule is called a(n) __________________________.
A shorthand notation that represents a compound or diatomic molecule is called a(n) __________________________.
2
The minimum amount of energy needed to start a reaction is called _________________________.
The minimum amount of energy needed to start a reaction is called _________________________.
2
In a(n) __________________________ reaction, ions in different compounds switch places.
In a(n) __________________________ reaction, ions in different compounds switch places.
2
In a chemical formula, if no ___________________ is written after an element, then only one atom of the element is present.
In a chemical formula, if no ___________________ is written after an element, then only one atom of the element is present.
2
A substance that slows down or stops a chemical reaction is called a(n) ________________________.
A substance that slows down or stops a chemical reaction is called a(n) ________________________.
2
The force that holds two atoms together is called a ____________________________.
The force that holds two atoms together is called a ____________________________.
2
When _____________________ bump into one another with enough energy, chemical bonds break.
When _____________________ bump into one another with enough energy, chemical bonds break.
2
When chemical bonds break, the atoms rearrange to form new ____________________.
When chemical bonds break, the atoms rearrange to form new ____________________.
2
A molecule made up of two atoms is ___________________.
A molecule made up of two atoms is ___________________.
2
something that is needed to break chemical bonds in reactants
something that is needed to break chemical bonds in reactants
2
the smallest amount of energy needed to start a chemical reaction
the smallest amount of energy needed to start a chemical reaction
2
the speed at which new particles form in a chemical reaction
the speed at which new particles form in a chemical reaction
2
something that slows a chemical reaction
something that slows a chemical reaction
2
something that speeds up a chemical reaction
something that speeds up a chemical reaction
2
exothermic reaction
exothermic reaction
2
endothermic reaction
endothermic reaction
2
activation energy
activation energy
2
energy absorbed
energy absorbed
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energy released
energy released