Chemical Reactions I
in an equation, the symbol for a substance in water solution is followed by
(aq)
which coefficients correctly balance the formula equation CaO+H2O -> Ca(OH)2
1, 1, 1
which coefficients correctly balance the formula equation: NH4NO2(s)-> N2(g)+H2O(l)
1, 1, 2
which equation is not balanced
2H+O2-> H2O
when the equation Fe3O4+Al -> Al2O3+Fe is correctly balance, what is the coefficient of Fe
9
which of the following is a formula equation for the formation of carbon dioxide from carbon and oxygen
C+02 -> CO2
in writing a chemical equation that produces hydrogen gas, the correct representation of hydrogen gas is
H2
in the chemical equation 2Mg(s)+O2(g) ? 2MgO(s)
Mg represents the reagent magnesium
predict the product of the reaction represented by the following equation MgO+CO2->
MgCO3
in the word equation, sodium oxide +water= sodium hydroxide, the formula for sodium hydroxide is represented by
NaOH
how would oxygen be represented in the formula equation for the reaction of methane and oxygen to yield carbon dioxide and water
O2
what is the balanced equation for the combustion of sulfur
S(s)+O2(g)-> SO2(g)
the complete balanced equation for the reaction between zinc hydroxide and acetic acid is
Zn(OH)2+2CH3COOH-> Zn(CH3COO)2+2H2O
a chemical formula written over the arrow in a chemical equation signifies
a catalyst for the reaction
what is the small whole number that appears in front of a formula in a chemical equation
a coefficient
when a solid produced by a chemical reaction separates from the solution it is called
a percipitate
after the first steps in writing an equation, the equation is balanced by
adjusting coefficients to the smallest whole-number ratio
In the equation 2Al(s)+3Fe(NO3)2(aq) -> 3Fe(s)+2Al(NO3)3(aq), iron has been replaced by
aluminum
according to the law of conservation of mass, the total mass of the reacting substances is
always equal to the total mass of the products
an insoluble gas that forms in a double-displacement reaction is aqueous solution
bubbles out of solution
when heated, a metal carbonate decomposes into a metal oxide and
carbon dioxide
To balance a chemical equation, it may be necessary to adjust the
coefficients
In what kind of reaction does a single compound produce two or more simpler substances
decomposition reaction
the equation AX-> A+X is the general equation for a
decomposition reaction
the reaction represented by the equation 2HgO(s)-> 2Hg(l)+O2(g) is a
decomposition reaction
in what kind of reaction does one element replace a similar element in a compound
displacement reaction
in what kind of reaction do the ions of two compounds exchange places in aqueous solution to form two new compounds
double-displacement reaction
the equation AX+BY-> AY+BX is the general equation for a
double-displacement reaction
the reaction represented by the equation Pb(NO3)2(aq)+2Kl(aq)->Pbl2(s)+2KNO3(aq) is a
double-displacement reaction
the decomposition of a substance by an electric current is called
electrolysis
the replacement of bromine by chlorine in a salt is an example of a single-displacement reaction by
halogens
active metals react with certain acids, such as hydrochloric acid, to yield a metal compound and
hydrogen
which word equation represents the reaction that produces water from hydrogen and oxygen
hydrogen + oxygen yields water
oxides of active metals, such as CaO, react with water to produce
metal hydroxides
one one type of synthesis reaction, an element combines with oxygen to yield a(n)
oxide
when a slightly soluble solid compound is produced in a double-displacement reaction, a
precipitate is formed
an active metal and a halogen react to form a(n)
salt
a chemical equation is balanced when the
same number of each kind of atom appears in the reactants and in the products
the equation A+BX -> AX+B is the general equation for a
single-displacement reaction
the reaction represented by the equation Cl2(g)+2KBr(aq) -> 2KCl(aq)+Br2(l) is a
single-displacement reaction
the reaction represented by the equation Mg(s)+2HCl(aq) -> H2(g)+MgCl2(aq)is a
single-displacement reaction
in what kind of reaction do two or more substances combine to form a new compund
synthesis reaction
the equation A+X-> AX is the general equation a(n)
synthesis reaction
the reaction represented by the equation 2Mg(s)+O2(g) -> 2MgO(s) is a
synthesis reaction
in a chemical reaction
the mass of the reactants equals the mass of the products
in a double-displacement reaction, hydrogen chloride and sodium hydroxide react to produce sodium chloride. Another product is
water
some acids, such as carbonic acid, decompose to nonmetal oxides and
water
when a binary compound decompose when heated to yield metal oxides and
water