Test 3

H2SO3

A certain oxyacid is derived from the oxyanion SO3^2- the formula for the oxyacid is

false

Cl-, Br- and I- are mostly insoluble

14

How many total atoms are in the formula Al2(CO3)3

False

SO2 is an ionic compound

barium chloride

a precipitate is expected to be formed when an aqueous solution of sodium sulfate is added to an aqueous solution of

false

a precipitation reaction will occur when sodium chloride is mixed with potassium nitrate

combustion reaction

a reaction in which a substance reacts with oxygen emitting heat and forming oxygen containing compounds is an example of a

gas evolution reaction

a reaction which forms a gaseous product is an example of a

precipitation reaction

a reaction which forms a solid product is an example of a

PbCl2

all of the following compounds are soluble in water except

ionic compound

ammonium fluoride is considered which of the following

water with another compound dissolved in it

an aqueous solution is

the symbols and formulas of all reactants and products

before a chemical equation can be written one must know

9

how many oxygen atoms are in the formula Al2(CO3)3

2

if you had an aqueous mixture that contained Ag+, K+ an dPb+2 cations how many different solids could precipitate if a chloride solution was added

2

if you had an aqueous mixture that contained Ag+, K+ and Pb+2 cations how many different solids could precipitate if a chloride solution was added

S

in writing the chemical equation for a precipitation reaction what abbreviation of the physical state must appear with one of the products

CO2

methane gas (CH4) on complete combustion in air produces

2Na + 2H2O →2NaOH (aq) + H2(g)

sodium metal reacts with water to form aqueous sodium hydroxide and hydrogen gas which equation below best describes the balanced equation for this reaction

False

the correct formula for calcium fluoride is CaF3-

false

the following equation is balanced CH4+2O2→CO2 + H2O

False

the following reaction is balanced AgNO3+ 2NH4Cl→AgCl + (NH4)2NO3

false

the formation of a gas is evidence of a chemical reaction while the emission of light is not

Mg(CIO3)2

the formula for potassium chlorate is KCIO3 the formula for magnesium chloride is MgCl2 what is the formula for magnesium chlorate

all samples of a given compound have the same proportion of their constituent elements

the law of constant composition states

False

the name of KNO3 is potassium nitratide

False

the subscripts in a chemical formula represent the relative mass of each atom in a chemical compound

1 nitric acid +1 sodium hydroxide→ 1 sodium nitrate +1 water

what are the coefficients for the following reaction when it is properly balanced

2 Na3(PO4) + 3Ba(NO3)2→ 6 Na(NO3) + 1Ba3(PO4)2

what are the coefficients for the following reaction when it is properly balanced

2 Na3PO4+ 3Ba(NO3)2 → 6NaNO3 + 1 Ba3 (PO4)2

what are the coefficients for the following reaction when it is properly balanced

2 potassium iodide+ 1 lead (II) acetate+1 lead(II) iodide + 2 potassium acetate

what are the coefficients for the following reaction when it is properly balanced

2HCL +1Mg→1MgCl2 + 1H2

what are the coefficients for the following reaction when it is properly balanced

H+ + Cl- + K+ + OH-→ H2O + K+ + Cl-

what is the complete ionic equation for the reaction of hydrochloric acid with potassium hydroxide

Pb2+ +2NO3- + 2K+ +2I- →PbI2(s) + 2K+ + 2NO3-

what is the correct complet ionic equation Pb(NO3)2 (aq) + 2KI (aq) →PbI2 (s) + 2KNO3(aq)

P4O10

what is the correct formula of a compound that has ten oxygen atoms and four phosphorus atoms

Pb2+ +2I- →PbI2(s)

what is the correct net ionic equation Pb(NO3)2 (aq) + 2KI (aq)→PbI2(s) + 2KNO3(aq)

MgS

what is the formula for an ionic compound made of magnesium and sulfur

163.43 amu

what is the formula mass for diboron tetrachloride

cobalt(II) sulfide

what is the name of CoS

nitrous acid

what is the name of HNO2

sodium oxide

what is the name of the compound whose formula is Na2O

sulfur pentafluoride

what is the name of the molecular compound SF5

hydrobromic acid

what is the proper name for HBr

precipitation

what type of a reaction occurs when a silver nitrate solution is mixed with sodium chloride solution

single displacement

what type of reaction is the generic equation A+BC→AC+B

synthesis/ combination

what type of reaction is the generic equation A+B→AB

double displacement

what type of reaction is the generic equation AB+CD→AD+CB

decomposition

what type of reaction is the generic equation AB→A+B

PbSO4

what would be the formula of the precipitate that forms when Pb(NO3)2 and K2SO4 are mixed

I2S5

what would the formula of diiodine pentasulfide be

Cl- (aq) + Ag+ (aq) → AgCl (s)

when a solution of MgCl2 and one of AgNO3 are mixed the net ionic equation is

False

when elements combine to form compounds their properties only change slightly

4

when the equation 4 NO2 + 2 H2O + O2→ 4 HNO3 is balanced the coefficient of HNO3 is

8

when the equation 8 O2 + 1C5H12→ 5CO2 + 6 H2O is

6

when the equation Ca3N2+ H2O → 3 Ca(OH)2 + 2NH3 is balanced the coefficient of H2O is

3

when the equation N2+ 3H2→2NH3 is balanced the coefficient of hydrogen is

no boiling water is a physical change

when water is heated bubbles form in the water is this evidence of a chemical reaction why

neon

which among the following elements does not exist as a diatomic molecule in nature

Pb2+, NO3-

which ion would not be a spectator ions

K+, NO3-

which ions would not be present in the net ionic equation Pb(NO3)2 + 2KI→ PbI2 + 2KNO3

aluminum sulfide

which of the following compounds is insoluble

4NH3 + 14O2 → 4 NO2 + 6H2O

which of the following equations is not balanced properly

solid formation, emission of light, gas formation, color change

which of the following is evidence that a chemical reaction has occured

the subscripts represent the relative mass of each type of atom in the compound

which of the following statements about chemical formulas is false