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Symbols
Key Terms
Reaction Type Representations
Reaction Type Definitions
Reaction Types
100
What state of matter does the symbol (s) in a reaction stand for?
What is solid.
100
What is the small whole number that appears in front of a formula in a chemical equation?
What is a coefficient.
100
The reaction represented by the equation 2Mg(s) + O2(g) ---> 2MgO(s) is a........
What is a synthesis reaction.
100
In what kind of reaction do the ions of two compounds exchange places in aqueous solution to form two new compounds?
What is a double displacement reaction.
100
The equation AX ---> A + X is the general equation for a?
What is decomposition reaction
200
What state of matter does the symbol (l) stand for in a chemical reaction?
What is liquid.
200
Which observation does not indicate that a chemical reaction has occurred? a. formation of a precipitate c. evolution of heat and light b. production of a gas d. change in total mass of substances
What is the change in total mass of substances.
200
The reaction represented by the equation Mg(s) + 2HCl(aq) ---> H2(g) + MgCl2(aq) is a...
What is single displacement reaction.
200
In what kind of reaction does a single compound produce two or more simpler substances?
What is decomposition.
200
The equation A + X ---> AX is the general equation for a?
What is synthesis reaction.
300
What state of matter does the symbol (g) stand for in a chemical reaction?
What is gas.
300
According to the law of conservation of mass, the total mass of the reacting substances is a. always more than the total mass of the products. b. always less than the total mass of the products. c. sometimes more and sometimes less than the total mass of the products. d. always equal to the total mass of the products.
What is d) always equal to the total mass of the products.
300
The reaction represented by the equation 2HgO(s) ---> 2Hg(l) + O2(g) is a(n)......
What is decomposition reaction.
300
In what kind of reaction does one element replace a similar element in a compound?
What is single displacement.
300
Which type of reaction only contains the elements C, H, and O?
What is combustion reaction.
400
What state of matter does the symbol (aq) stand for in a chemical reaction?
What is aqueous.
400
After the first steps in writing an equation, the equation is balanced by a. adjusting subscripts to the formula(s). b. adjusting coefficients to the smallest whole-number ratio. c. changing the products formed. d. making the number of reactants equal to the number of products.
What is b) adjusting coefficients to the smallest whole number ratio.
400
The reaction represented by the equation Pb(NO3)2(aq) + 2KI(aq) ---> PbI2(s) + 2KNO3(aq) is a
What is a double displacement reaction.
400
In what kind of reaction do two or more substances combine to form a new compound?
What is a synthesis reaction.
400
The equation AX + BY ---> AY + BX is the general equation for a?
What is double displacement reaction.
500
How would oxygen be represented in the formula equation for the reaction of methane and oxygen to yield carbon dioxide and water? a. oxygen b. O c. O2 d. O3
What is O2
500
A chemical equation is balanced when the a. coefficients of the reactants equal the coefficients of the products. b. same number of each kind of atom appears in the reactants and in the products. c. products and reactants are the same chemicals. d. subscripts of the reactants equal the subscripts of the products.
What is b) the same number of each kind of atom appears in the reactants and in the products.
500
C3H8 + O2 ---> CO2 + H2O is what kind of reaction?
What is a combustion reaction.
500
In what kind of reaction do carbon, hydrogen, and oxygen react to produce carbon dioxide and water?
What is combustion.
500
The equation A + BX ---> AX + B is the general equation for a
What is single displacement reaction.