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 3Fe(s)+2Al(NO3)3(aq), iron has been replaced by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