Answers(2) C (13) C

(3) B (14) D

(4) C (15) D

(5) B (16) D

(6) A (17) A

(7) C (18) D

(8) A (19) B

(9) D (20) D

(10) A (21) A

(11) B (22) B

(12) C

What are the reactants in the following chemical equation:

Zn + CuSO4 ZnSO4 + Cu

A.) zinc and copper

B.) zinc sulfate and copper

C.) zinc and copper (II) sulfate

D.) only zinc

What are the products in the following chemical equation:

Zn + CuSO4 ZnSO4 + Cu

A.) zinc and copper

B.) zinc sulfate and copper

C.) zinc and copper (II) sulfate

D.) only zinc

Chemical equations must be balanced to satisfy ____.

A.) the law of definite proportions

B.) the law of multiple proportions

C.) the law of conservation of mass

D.) Avogadro’s principle

Given the incomplete equation:

4Fe + 3O2 2X

Which compound is represented by X?

A.) FeO

B.) Fe2O3

C.) Fe3O2

D.) Fe3O4

CaSO4 + AlCl3 Al2(SO4)3 + CaCl2

What is the coefficient of Al2(SO4)3 when the equation is completely balanced using the smallest

whole-number coefficients?

A.) 1

B.) 2

C.) 3

D.) 4

Given the incomplete equation:

2N2O5(g)

Which set of products completes and balances the incomplete equation?

A.) 2N2(g) + 3H2(g)

B.) 2N2(g) + 2O2(g)

C.) 4NO2(g) + O2(g)

D.) 4NO(g) + 5O2(g)

Given the unbalanced equation:Al + O2 Al2O3

When this equation is completely balanced using smallest whole

numbers, what is the sum of the coefficients?

A.) 9

B.) 7

C.) 5

D.) 4

The equation 2C3H7 + 9O2 6CO2 + 8H2O is an example of which type of

reaction?

A.) single-replacement reaction

B.) double-replacement reaction

C.) decomposition reaction

D.) combustion reaction

The equation H3PO4 + 3KOH K3PO3 + 3H2O is

an example of which type of reaction?

A.) double-replacement reaction

B.) combination reaction

C.) decomposition reaction

D.) single-replacement reaction

The equation Mg(s) + 2HCl(aq) MgCl2(aq) + H2(g)

is an example of which type of reaction?

A.) combination reaction

B.) single-replacement reaction

C.) decomposition reaction

D.) double-replacement reaction

The reaction 2Fe + 3Cl2 2FeCl3

is an example of which type of reaction?

A.) combustion reaction

B.) single-replacement reaction

C.) combination reaction

D.) decomposition reaction

In a combustion reaction, one of the reactants is ____.

A.) hydrogen

B.) nitrogen

C.) oxygen

D.) a metal

Which of the following elements is diatomic?

A.) sulfur

B.) neon

C.) phosphorus

D.) iodine

What is the correct formula for calcium nitride?

A.) CaN

B.) Ca3Ni2

C.) Ca2N3

D.) Ca3N2

If you rewrite the following word equation as a balanced chemical equation, what will the coefficient and symbol for fluorine be?

nitrogen trifluoride nitrogen + fluorine

A.) 6F2

B.) F3

C.) 6F

D.) 3F2

What is the charge on copper in the formula CuNO3?

A.) Cu+1

B.) Cu+2

C.) Cu+3

D.) Cu+4

What is the charge on lead in the formula Pb(CO3)2

A.) Pb+1

B.) Pb+2

C.) Pb+3

D.) Pb+4

In order for the reaction 2Al + 6HCl 2AlCl3 + 3H2

to occur, which of the following must be true?

A.) Al must be above Cl on the activity series.

B.) Al must be above H on the activity series.

C.) Heat must be supplied for the reaction.

D.) A precipitate must be formed.

Complete a balanced equation for the following reaction.

Ag(s) + KNO3(aq)

A.) AgNO3 + K

B.) AgK + NO3

C.) AgKNO3

D.) No reaction

A double-replacement reaction takes place when aqueous Na2CO3 reacts with aqueous

Sn(NO3)2. You would expect one of the products of this reaction to be ________.

A.) NaNO3

B.) NaSn

C.) Sn(CO3)2

D.) CNO3

What is the balanced chemical equation for the reaction that takes place between bromine and sodium

iodide?

A.) Br2 + NaI NaBr2 + I

B.) Br2 + 2NaI 2NaBr + I2

C.) Br + NaI2 NaBrI2

D.) Br + NaI2 NaBr + I2