The coefficients in the balanced equation Au 2 S 3 + H 2 ? Au + H 2 S are 1: 6:
ID: 805866 • Letter: T
Question
The coefficients in the balanced equation Au2S3 + H2 ? Au + H2S are 1: 6: 2: 3.
A) True
B) False
33.
In a voltaic cell, the oxidizing agent and the reducing agent are placed in the same half cell.
A) True
B) False
34.
The coefficients in the balanced equation KClO3 ? KCl + O2 are 2: 2: 3.
A) True
B) False
35.
In a combination reaction, two or more compounds yield two or more compounds.
A) True
B) False
36.
The salt bridge is a necessary component of the voltaic cell for it to operate properly.
A) True
B) False
37.
Match the word or phrase in the right column that completes the statement in the right column.
A key reactant in a combustion reaction is _____.
The substance that gains electrons is called the _____ agent.
Any chemical change in which an element loses electrons is called _____.
A secondary battery or a storage battery is also known as a _____ battery.
A battery is a substance that converts _____ energy to electrical energy.
The component of the voltaic cell through which ions can flow is called the _____.
38.
Match each element in every anion in the left column with its oxidation state that appears in the right column.
manganese in the MnO4-
phosphorus in the PO43-
carbon in the CO32-
nitrogen in NaNO2
chromium in K2CrO4
chlorine in NaClO
sulfur in aluminum sulfide
nitrogen in sodium nitride
iron in iron metal
bromine in potassium bromide
magnesium in magnesium fluoride
39.
Match every equation in the left column with its type that appears in the right column.
Mg + HCl ? H2 + MgCl2
CH4 + O2 ? CO2 + H2O
NaClO3 ? NaCl + O2
H2 + O2 ? H2O (Do not choose combustion!)
Mg + N2 ? Mg2N3
Mg + HBr ? MgBr2 + H2
H2O2 ? H2 + O2
40.
Match the word or phrase in the right column that completes the statement in the right column.
_____ is the measure of the force that moves electrons from the anode to the cathode in a voltaic cell.
The cathode is the electrode in a voltaic cell at which _____ occurs.
In a voltaic cell, the sign of the electrode is _____ where oxidation takes place.
A. chemical B. oxidizing C. oxidation D. rechargeable E. oxygen F. electrolyteExplanation / Answer
32. B) False
33. B) False
34. A) True
35. B) False
36. A) True
37. A key reactant in a combustion reaction is E. oxygen
ABCDEFThe substance that gains electrons is called the _B. oxidizing____ agent.
Any chemical change in which an element loses electrons is called C. oxidation
A secondary battery or a storage battery is also known as a _D. rechargeable____ battery
A battery is a substance that converts __A. chemical___ energy to electrical energy
The component of the voltaic cell through which ions can flow is called the F. electrolyte
38.
MnO4- G. +7
PO43- E. +5
CO32- D. +4
NaNO2 C. +3
K2CrO4 F. +6
NaClO A. +1
aluminum sulfide J. -2
sodium nitride K. -3
iron metal H. 0
potassium bromide I. -1
magnesium fluoride B. +2
39.
Mg + HCl ? H2 + MgCl2 A. single replacement
CH4 + O2 ? CO2 + H2O B. combustion
NaClO3 ? NaCl + O2 C. decomposition
H2 + O2 ? H2O D. combination
Mg + N2 ? Mg2N D. combination
Mg + HBr ? MgBr2 + H2 A. single replacement
H2O2 ? H2 + O2 C. decomposition
40.
is the measure of the force that moves electrons from the anode to the cathode in a voltaic cell. A. voltage
The cathode is the electrode in a voltaic cell at which _B. reduction____ occurs.
In a voltaic cell, the sign of the electrode is _C. negative____ where oxidation takes place.