Chemistry Test #3

Methane gas (CH4), on complete combustion in air, produces: 1. CO2 2. H2 3. H2O A) 1 and 2 only B) 1 and 3 only C) 2 and 3 only D) All of 1 and 2 only

1 and 3 only

What are the coefficients for the following reaction when it is properly balanced? ___nitric acid +___sodium hydroxide----->___sodium nitrate+___water A) 2, 1, 1, 1 B) 2, 3, 2, 2 C) 5, 2, 2, 1 D) 1, 1, 1, 1

1, 1, 1, 1

What are the coefficients for the following reaction when it is properly balanced? __nitric acid+__sodium hydroxide-->__sodium nitrate+__water a. 2, 1, 1, 1 b. 2, 3, 2, 2 c. 5, 2, 2, 1 d. 1, 1, 1, 1

1, 1, 1, 1

The Roman numerals in the reaction given represent the coefficients in the balanced chemical equation. What are the values of the coefficients? I Ni(ClO4)2 + II K2S--> III KClO4 + IV NiS a. 2, 1, 1, 2 b. 1, 2, 1, 1 c. 1, 1, 2, 1, d. 1, 1, 1, 2 e. 1, 2, 2, 1

1, 1, 2, 1

The Roman numerals in the reaction given represent the coefficients in the balanced chemical equation. What are the values of the coefficients? I BaCl2 + II AgNO3--> III Ba(NO3)2 + IV AgCl a. 1, 2, 2, 1 b. 1, 1, 2, 2 c. 2, 1, 1, 1 d. 1, 1, 1, 2 e. 1, 2, 1, 2

1, 2, 1, 2

The Roman numerals in the reaction given represent the coefficients in the balanced chemical equation. What are the values of the coefficients? I Fe3O4 + II H2-->III Fe + IV H2O a. 1, 1, 3, 2 b. 1, 2, 3, 2 c. 1, 4, 3, 4 d. 2, 8, 6, 8 e. 2, 4, 6, 4

1, 4, 3, 4

How many hydrogen atoms are in 35.0 grams of hydrogen gas? a. 4.25 x 10^25 b. 2.09 x 10^25 c. 2.12 x 10^25 d. 1.05 x 10^25

1.05 x 10^25

How many moles are there in 82.5 grams of iron? a. 4.97x10^25 b. 55.85 c. 0.677 d. 1.48

1.48

How many atoms are in 1.50 moles of fluorine gas? a. 6.022x10^23 b. 9.03x10^23 c. 18.98 d. 1.81x10^24

1.81x10^24

If a sample of carbon dioxide contains 3.8 moles of oxygen atoms, how many moles of carbon dioxide are in the sample? A) 1.9 B) 3.8 C) 7.6 D) 11.4

1.9

One mole of boron has a mass of _____ g. a. 9.012 b. 6.022x10^23 c. 5 d. 10.811

10.811

A 42.7 gram sample of potassium nitrate contains how many grams of potassium? A) 39.1 B) 16.5 C) 21.4 D) 8.54

16.5

Calculate the molar mass of calcium nitrate. A) 136.03 g/mol B) 102.09 g/mol C) 132.10 g/mol D) 164.10 g/mol

164.10 g/mol

What is the mass of 3.09 x 10^24 atoms of sulfur in grams? A) 9.64 x 10^22 B) 9.91 x 10^25 C) 165 D) 0.160 E) none of the above

165

In the reaction given below, if 12 molecules of aluminum oxide are consumed, how many molecules of oxygen gas are produced? 2 Al2O3 -->4 Al + 3 O2 a.3 b.4 c.6 d.12 e.18

18

How many moles of fluorine are in 3.2 moles of xenon hexafluoride? A) 22.4 B) 12.8 C) 19.2 D) 16

19.2

If you had an aqueous mixture that contained Ag+, K+, and Pb2+ cations, how many different solids could precipitate if a chloride solution was added? a. 1 b. 2 c. 3 d. 4

2

Potassium metal and chlorine gas react in a combination reaction to produce an ionic compound. What is the correct balanced equation for this reaction? a.2 K(s) + Cl2(g) --> 2 KCl(s) b.K(s) + Cl2(g) --> KCl(s) c.K(s) + Cl(g) --> KCl(s) d.K2(s) + Cl2(g) --> 2 KCl(s) e.K(s) + Cl2(g) --> KCl2(s)

2 K(s) + Cl2(g) --> 2 KCl(s)

Identify the double displacement reactions among the following: 1. KCl(aq) + AgNO3(aq) --> AgCl(s) + KNO3(aq) 2. Na2SO4(aq) + BaCl2(aq) --> BaSO4(s) + 2NaCl(aq) 3. H2SO4(aq) + 2NaOH(aq) --> NaSO4(aq) + 2H2O(l) a. 1 and 2 only b. 1 and 3 only c. 2 and 3 only d. all of 1, 2, and 3 e. none of 1, 2, and 3

2 and 3 only

One mole of ammonium nitrate contains: A) 3 moles of hydrogen B) 2 moles of oxygen C) 2 moles of nitrogen D) 1 mole of nitrogen.

2 moles of nitrogen

What are the coefficients for the following reaction when it is properly balanced? ___HCl+___Mg-->___MgCl2+___H2 A) 2, 1, 1, 1 B) 2, 1, 2, 2 C) 1, 2, 1/2, 1 D) 1, 1, 1, 2

2, 1, 1, 1

What are the coefficients for the following reaction when it is properly balanced? ___HCl+___Mg-->___MgCl2+___H2 a. 2, 1, 1, 1 b. 2, 1, 2, 2 c. 1, 2, 1/2, 1 d. 1, 1, 1, 2

2, 1, 1, 1,

What are the coefficients for the following reaction when it is properly balanced? ___O2+___CH2-->___CO2+___H2O A) 2, 1, 3, 1 B) 2, 3, 2, 2 C) 1, 3, 2, 1 D) 2, 1, 1, 2

2, 1, 1, 2

What are the coefficients for the following reaction when it is properly balanced? ___O2+___CH4-->___CO2+___H2O a. 2, 1, 3, 1 b. 2, 3, 2, 2 c. 1, 3, 2, 1 d. 2, 1, 1, 2

2, 1, 1, 2

What are the coefficients for the following reaction when it is properly balanced? __potassium iodide+__lead(II)acetate-->__lead(II) iodide+__potassium acetate a. 2, 1, 1, 1 b. 2, 1, 1, 2 c. 3, 2, 2, 1 d. 1, 1, 2, 2

2, 1, 1, 2

What are the coefficients for the following reaction when it is properly balanced? ___nitrogen monoxide + ___carbon monoxide----------------->___nitrogen + ___carbon dioxide A) 2, 1, 1, 2 B) 2, 2, 1, 2 C) 2, 2, 2, 1 D) 1, 1, 2, 2

2, 2, 1, 2

What are the coefficients for the following reaction when it is properly balanced? __nitrogen monoxide+__carbon monoxide-->__nitrogen+__carbon dioxide a. 2, 1, 1, 2 b. 2, 2, 1, 2 c. 2, 2, 2, 1 d. 1, 1, 2, 2

2, 2, 1, 2

The Roman numerals in the reaction given represent the coefficients in the balanced chemical equation. What are the values of the coefficients? I Al + II H2SO4--> III Al2(SO4)3 + IV H2 a. 3, 1, 3, 2 b. 3, 1, 1, 3 c. 2, 3, 1, 3 d. 2, 3, 2, 3 e. 4, 6, 1, 6

2, 3, 1, 3

The Roman numerals in the reaction given represent the coefficients in the balanced chemical equation. What are the values of the coefficients? I CH3OH + II O2 --> III CO2 + IV H2O a. 1, 2, 1, 2 b. 1, 3, 1, 2 c. 2, 3, 2, 4 d.2, 5, 2, 2 e.4, 6, 4, 8

2, 3, 2, 4

What are the coefficients for the following reaction when it is properly balanced? __Na3PO4+__Ba(NO3)2---->__NaNO3+__Ba3(PO4)2 A) 2, 1, 1, 3 B) 2, 3, 1, 6 C) 2, 3, 6, 1 D) 6, 1, 3, 2

2, 3, 6, 1

What are the coefficients for the following reaction when it is properly balanced? ___Na3PO4+___Ba(NO3)2-->___NaNO3+___Ba3(PO4)2 a. 2, 1, 1, 3 b. 2, 3, 1, 6 c. 2, 3, 6, 1 d. 6, 1, 3, 2

2, 3, 6, 1

How many moles of Cu are in 1.48x10^25 Cu atoms? a. 0.0408 b. 24.6 c. 1.54x10^25 d. 6.022x10^23

24.6

In the reaction given below, for every two molecules of aluminum oxide consumed, how many molecules of oxygen are produced? 2Al2O3--> 4Al + 3O2 a.1 b.2 c.3 d.6 e.9

3

When the equation, __N2+__H2-->__NH3 is balanced, the coefficient of hydrogen is: a. 1 b. 2 c. 3 d. 4

3

When the equation, is balanced, the coefficient of hydrogen is: ___N2+___H2--->___NH3 A) 1 B) 2 C) 3 D) 4

3

The Roman numerals in the reaction given represent the coefficients in the balanced chemical equation. What are the values of the coefficients? I K2S + II AlCl3 III KCl + IV Al2S3 a. 3, 2, 3, 2 b. 2, 3, 2, 3 c. 1, 1, 2, 1 d. 3, 2, 6, 2 e. 3, 2, 6, 1

3, 2, 6, 1

How many atoms are in 15.6 grams of silicon? a. 2.64x10^26 b. 3.34x10^23 c. 0.555 d. 438

3.34x10^23

ow many atoms are in 5.80 moles of He? A) 6.0210x10^23 B) 1.03x10^23 C) 4.00 D) 3.49x10^24 E) none of the above

3.49x10^24

How many moles of carbon are in 3.5 moles of calcium carbonate? A) 10.5 B) 3.5 C) 7 D) 100.09

3.5

How many moles of iron are contained in 1.75 kg of iron? a. 3.13x10^-2 b. 3.13x10^-4 c. 31.3 d. 3.13x10^4

31.3

One more of oxygen gas has a mass of _____ g. a. 16.0 b. 32.0 c. 6.022x10^23 d. 8

32

What is the molar mass of aluminum sulfate? A) 123.0 g/mol B) 278.0 g/mol C) 306.2 g/mol D) 315.2 g/mol E) 342.2 g/mol

342.2 g/mol

What is the mass in grams of 5.40 moles of lithium? a. 6.94 b. 37.5 c. 1.29 d. 3.25x10^24

37.5

What is mass of 0.560 moles of chlorine gas? a. 19.9 b. 63.3 c. 127 d. 39.7

39.6

One mole of potassium sulfate contains: A) 4 moles of oxygen B) 2 moles of sulfur C) 1 mole of potassium D) 3 moles of potassium.

4 moles of oxygen

The Roman numerals in the reaction given represent the coefficients in the balanced chemical equation. What are the values of the coefficients? I KO2+ II H2O--> III KOH+ IV O2 a. 2, 1, 2, 1 b. 2, 2, 4, 3 c. 1, 1, 1, 1 d. 4, 2, 4, 3 e. 8, 4, 8, 6

4, 2, 4, 3

The Roman numerals in the reaction given represent the coefficients in the balanced chemical equation. What are the values of the coefficients? I NH3 + II O2--> III NO + IV H2O a. 2, 5, 2, 3 b. 4, 5, 4, 6 c. 2, 2, 2, 3 d. 4, 4, 4, 6 e. 8, 10, 8, 12

4, 5, 4, 6

How many molecules of nitrogen monoxide are in 22.5 gram sample? a. 5.86 x 10^23 b. 7.33 x 10^23 c. 4.51 x 10^23 d. 4.06 x 10^23

4.51 x 10^23

The mass of one mole of carbon dioxide is ____g. a. 28.01 b. 384.4 c. 32.00 d. 44.01

44.01

How many molecules of sulfur trioxide are in 78.0 grams? a. 5.87 x 10^23 b. 7.33 x 10^23 c. 3.76 x 10^27 d. 0.974

5.87 x 10^23

What is the correct value for Avogadro's number? A) 6.022x 10^23 B) 6.022x10^33 C) 6.023x10^22 D) 6.022x10^2.3 E) none of the above

6.022x10^23

A 15.5 gram sample of diphosphorous pentoxide contains how many grams of phosphorous? A) 3.38 B) 1.69 C) 6.76 D) 13.5

6.76

For the reaction given below, how many molecules of aluminum will react if 12 molecules of Br2 react and 8 molecules of AlBr3 are produced? 2 Al + 3 Br2--> 2 AlBr3 a.4 b.8 c.12 d.16 e.40

8

When the equation, __O2+__C3H12-->__CO2+__H2O is balanced, the coefficient of O2 is a. 3 b. 4 c. 5 d. 8

8

When the equation, is balanced, the coefficient of O2 is: ___O2+___C5H12--->__CO2+___H2O A) 3 B) 4 C) 5 D) 8

8

One mole of (NH4)2HPO4 contains how many moles of hydrogen atoms? a. 4 b. 2 c. 8 d. 9

9

Which of the following molecules contain 9.02 x 10^23 atoms? a. 4.00 g H2 b. 9.00 g H2O c. 28.0 g N2 d. 32.0 g O2

9.00 H2O

Calculate the molar mass of ammonium carbonate. A) 78.05 g/mol B) 88.05 g/mol C) 96.09 g/mol D) 112.09 g/mol

96.09 g/mol

Which of the following statements about redox reactions is FALSE? A) Oxidation is the loss of electrons. B) Reduction is the gain of electrons. C) A reaction can result in either oxidation or reduction, not both. D) A reaction involving elemental oxygen is a redox reaction. E) All of the above statement are true.

A reaction can result in either oxidation or reduction, not both

You have 10.0 g each of Na, C, Pb, Cu and Ne. Which contains the largest number of moles? a. Na b. C c. Pb d. Cu e. Ne

C

When a solution of MgCl2 and one of AgNO3 are mixed, the net ionic equation is A)Mg2+(aq) + 2Cl-(aq) + 2Ag+(aq) + 2NO3-(aq) --> Mg2+(aq) + 2NO3-(aq) + 2AgCl(s) B) Mg2+(aq) + 2Cl-(aq) + 2Ag+(aq)+ 2NO3-(aq) --> Mg(NO3)2(aq) + 2AgCl(s) C) Mg2+(aq) + 2NO3-(aq) --> Mg(NO3)2(aq) D) Cl-(aq) + Ag+(aq) --> AgCl(s)

Cl-(aq) + Ag+(aq) --> AgCl(s)

In the reaction shown below, which substance is a solid? Cu(s) + H2SO4(aq)---> CuSO4(aq) + H2(g) a.H2SO4 and CuSO4 b.Cu and CuSO4 c.Cud.H2 and H2SO4 e.H2 and Cu

Cu

What is the net ionic equation for the reaction of hydrochloric acid with potassium hydroxide? a. H+ + Cl- + K+ + OH- --> H20+ K+ + Cl- b. HCl + KOH --> H2O + KCl c. H+ + OH- --> H20+ K2+ + 2Cl- d. H+ + OH- --> H20

H+ + OH- --> H2O

What is the complete ionic equation for the reaction of hydrochloric acid with potassium hydroxide? A) H+ +Cl- +K+ +OH- -->H2O +K+ +Cl- B) H+ + Cl- + K+ + OH- --> 2H+ + O2- + K+ + Cl- C) H+ + OH- --> H20 D) 2H+ + 2Cl- + K2+ +2OH- --> H2O + K2+ 2Cl-

H+ +Cl- +K+ +OH- -->H2O +K+ +Cl-

In the reaction shown below, which substances are dissolved in water? Cu(s) + H2SO4(aq)---> CuSO4(aq) + H2(g) a.H2SO4 and CuSO4 b.Cu and CuSO4 c.Cud.H2 and H2SO4 e.H2 and Cu

H2SO4 and CuSO4

What is the molecular equation for the reaction of hydrochloric acid with potassium hydroxide? A) H2Cl+2KOH-->H2O+2KCl B)2HCl+K(OH)2-->2H2O+KCl2 C) H+ +OH- -->H2O D) HCl+KOH-->H2O+KCl

HCl+ KOH--> H20+ KCl

Which is a spectator ion from the following complete ionic equation: Ag+(aq) + NO3-(aq) + K+(aq) + Br-(aq) --> AgBr(s) + K+(aq) + NO3-(aq) a. Ag+ b. Br- c. K+ d. AgBr

K+

Consider the following precipitation reaction: Pb(NO3)2(aq)+ 2KI(aq)--> PbI2(s)+ 2KNO3 (aq) Which ion(s) would not be present in the net ionic equation? a. Pb2+, NO3- b. K+, NO3- c. K+, Pb2+ d. K+, I-

K+, NO3-

You have 10.0 g each of Na, C, Pb, Cu and Ne. Which contains the smallest number of moles? a. Na b. C c. Pb d. Cu e. Ne

Pb

Considering the following precipitation reaction: Pb(NO3)2(aq) + 2KI(aq) → PbI2(s) + 2KNO3(aq) What is the correct net ionic equation? a. Pb2+ + I2- --> PbI2(s) b. 2NO3- + 2K+ --> 2KNO3 c. Pb2+ + 2NO3- + 2K+ + 2I- --> PbI2(s)+ 2K+ + 2NO3- d. Pb2+ + 2I- --> PbI2(s)

Pb2+ + 2I- --> PbI2(s)

Considering the following precipitation reaction: Pb(NO3)2(aq) + 2KI(aq) → PbI2(s) + 2KNO3(aq) Which ion(s) would no be spectator ions? a. Pb2+, NO3- b. K+, I- c. NO3-, Pb2+ d. Pb2+, I-

Pb2+, I-

All of the following compounds are soluble in water EXCEPT a. NaCl b. CaCl2 c. FeCl3 d. NH4Cl e. PbCl2

PbCl2

Considering the following precipitation reaction: Pb(NO3)2(aq) + 2KI(aq) → PbI2(s) + 2KNO3(aq) What is the correct complete ionic equation? a. PbI2 b. KNO3 c. Pb(NO3)2 d. KI

PbI2

Which of the following statements about balancing reactions is FALSE? A) If there is no coefficient or subscript, a one is implied. B) When coefficients are added the type of compounds is changed in the chemical reaction. C) Subscripts are multiplied by the coefficients to determine the number of atoms in a compound. D) Coefficients are added to compounds to ensure both sides of the reaction have equal numbers of each atom. E) All of the above statements are true.

When coefficients are added the type of compounds is changed in the chemical reaction

What type of a reaction occurs when a sodium hydroxide solution is mixed with an acetic acid solution? A) precipitation B) acid-base neutralization C) oxidation-reduction D) gas evolution E) no reaction

acid-base neutralization

Identify the oxidation-reduction reactions among the following: 1. Zn(s)+ Cu(aq) --> Zn2+(aq) + Cu(s) 2.2Na(s)+ Cl2(aq) --> 2NaCl(s) 3. 2Mg(s) + O2(g) --> 2MgO a. 1 and 2 only b. 1 and 3 only c. 2 and 3 only d. all of 1, 2, and 3 e. none of 1, 2, and 3

all of 1, 2, and 3

One mole of ammonium nitrite contains: A) 2 moles of nitrogen atoms B) 4 moles of hydrogen atoms C) 2 moles of oxygen atoms D) All of A, B, and C E) None of A, B, and C

all of A, B, and C

Which of the following is NOT evidence that a chemical reaction has occurred? A) color change B) solid formation C) gas formation D) release of heat E) all of the above are evidence of a chemical reaction

all of the above are evidence of a chemical reaction

Which of the following is NOT evidence that a chemical reaction has occurred? A) color change B) solid formation C) gas formation D) emission of light E) All of the above are evidence of a chemical reaction.

all of the above are evidence of a chemical reaction

Which of the following is NOT a sign of a chemical reaction?A) absorbing heat B) emission of heat C) color change D) solid formation E) All of the above are signs of a chemical reaction.

all of the above are signs of a chemical reaction

Consider the following precipitation reaction: Pb(NO3)2(aq)-->PbI2(s)+ 2KNO3 (aq) Which ion would not be present in the complete ionic equation? a. Pb2+ b. K+ c. NO3- d. I- e. all the above ions are in the complete ionic equation

all the above are in the complete ionic equation

Which of the following statements about writing molecular, complete and net ionic equations is FALSE? A) A molecular equation is a chemical equation showing the complete, neutral formulas for every compound in a reaction. B) A complete ionic equation is a chemical equation showing all of the species as they are actually present in solution. C) A net ionic equation is an equation showing only the species that actually change during the reaction. D) A spectator ion remains unchanged in the reaction and appears on both sides of the equation. E) All of the statements are true.

all the statements are true

Which of the following compounds is SOLUBLE? a. aluminum hydroxide b. aluminum sulfide c. aluminum carbonate d. aluminum sulfate

aluminum sulfate

Which of the following compounds is INSOLUBLE? a. potassium acetate b. lithium carbonate c. magnesium bromide d. aluminum sulfide

aluminum sulfide

A precipitate is expected to be formed when an aqueous solution of sodium sulfate is added to an aqueous solution of a. iron(III) chloride b. potassium chloride c. magnesium chloride d. barium chloride

barium chloride

What is the gas produced when hydrochloric acid is reacted with ammonium carbonate? A) ammonia B) chlorine C) hydrogen D) carbon dioxide E) none of the above

carbon dioxide

What type of reaction is the generic equation AB --> A+ B? A) synthesis/combination B) decomposition C) single displacement D) double-displacement E) none of the above

decomposition

What type of reaction is the generic equation AB+ CD--> AD+ CB? A) synthesis/combination B) decomposition C) single displacement D) double-displacement E) none of the above

double-displacement

Which of the following types of compounds will not undergo a gas evolution reaction when acid is added? A) sulfides B) carbonates C) hydroxides D) bisulfites E) none of the above

hydroxides

Which of the following compounds is INSOLUBLE? a. magnesium phosphate b. magnesium sulfate c. magnesium iodide d. magnesium nitrate

magnesium phosphate

What type of a reaction occurs when a potassium nitrate solution is mixed with a barium acetate solution? a. precipitation b. acid-base neutralization c. oxidation-reduction d. gas evolution e. no reaction

no reaction

When water is heated, bubbles form in the water. Is this evidence of a chemical reaction? Why? A) No, boiling water is a physical change. B) Yes, the formation of a gas is evidence of a chemical reaction. C) No, the formation of gas bubbles is a secondary chemical reaction which is ignored. D) Yes, the formation of a gas is proof a new compound has been made. E) none of the above

no, boiling water is a physical change

When water is heated, bubbles form in the water. Is this evidence of a chemical reaction? Why? A) No, boiling water is a physical change. B) Yes, the formation of a gas is evidence of a chemical reaction. C) No, the formation of gas bubbles is a secondary chemical reaction which is ignored. D) Yes, the formation of a gas is proof a new compound has been made. E) none of the above

no, boiling water is a physical change

Which of the following statements about the mole is FALSE? A) The size of a mole of atoms has a reasonable mass. B) A mole of an element corresponds to one Avogadro number of atoms. C) One mole of an element has a mass equal to its atomic mass expressed in grams. D) One mole of water contains 1/2 mole of oxygen atoms. E) none of the above

one mole of water contains 1/2 mole of oxygen atoms

What type of a reaction occurs when potassium metal reacts with fluorine gas? A) precipitation B) acid-base neutralization C) oxidation-reduction D) gas evolution E) no reaction

oxidation-reduction

Which of the following compounds is SOLUBLE? a. copper carbonate b. calcium carbonate c. potassium carbonate d. strontium carbonate

potassium carbonate

What type of a reaction occurs when a silver nitrate solution is mixed with sodium chloride solution? A) precipitation B) acid-base neutralization C) oxidation-reduction D) gas evolution E) no reaction

precipitation

A reaction which forms a solid product is an example of a(n)________. A) oxidation-reduction reaction B) combustion reaction C) precipitation reaction D) gas evolution reaction E) none of the above

precipitation reaction

hat type of reaction is the generic equation A+ BC--> AC+ B? A) synthesis/combination B) decomposition C) single displacement D) double-displacement E) none of the above

single displacement

Which of the following everyday substances does not typically contain an acid? A) lemons B) vinegar C) soap D) limes

soap

What type of reaction is the generic equation A+B-->AB? A) synthesis/combination B) decomposition C) single displacement D) double-displacement E) none of the above

synthesis/combination

Before a chemical equation can be written, one must know A) the atomic mass of all the elements involved. B) the molar mass of all the compounds. C) the symbols and formulas of all reactants and products. D) the number of moles of all reactants and products. E) none of the above.

the symbols and formulas of all reactants and products

An aqueous solution is: A) any liquid with another compound dissolved in it. B) an ionic compound with water dissolved in it. C) water with a molecular compound dissolved in it. D) water with another compound dissolved in it. E) none of the above

water with another compound dissolved in it

An aqueous solution is: a. any liquid with another compound dissolved in it b. an ionic compound with water dissolved in it c. water with a molecular compound dissolved in it d. water with another compound dissolved in it

water with another compound dissolved in it

A redox reaction has occurred __________. A) when a substance reacts with elemental oxygen B) when an alkali metal reacts with an alkaline earth metal C) when one substance transfers electrons or protons to another D) when one substance forms a solid E) when all of the above occur

when a substance reacts with elemental oxygen

How many moles are there in 1.75 grams of sodium? a. 22.99 b. 1.05x10^25 c. 0.761 d. 1.31

0.761

In writing the chemical equation for a precipitation reaction, what abbreviation of the physical state must appear with one of the products? a. (s) b. (g) c. (l) d. (w)

(s)

How many moles of Pb are in 4.71x10^21 Pb atoms? a. 0.00782 b. 2.84x10^45 c. 207.2 d. 6.022x10^23

0.00782

What is the mass of 1.56 x 10^21 atoms of magnesium in grams? A) 4.72 x 10^-5 B) 0.0630 C) 0.142 D) 1.07 x 10^-4 E) none of the above

0.0630

How many moles of bromine gas are in 37.7 grams? a. 0.236 b. 0.472 c. 3.01x10^3 d. 79.9

0.236

In comparing 1 mole of carbon atoms to one mole of magnesium atoms, which statement is true? A) The mass of 1 mole of carbon is greater than the mass of 1 mole of magnesium. B) The mass of 1 mole of magnesium is greater than the mass of 1 mole of carbon. C) The mass of 1 mole of carbon is the same as the mass of 1 mole of magnesium. D) There are more atoms in 1 mole of magnesium than in 1 mole of carbon.

The mass of 1 mole of magnesium is greater than the mass of 1 mole of carbon

What type of a reaction occurs when a hydrochloric acid solution is mixed with a sodium bicarbonate solution? A) precipitation B) acid-base neutralization C) oxidation-reduction D) gas evolution E) no reaction

gas evolution

A reaction which forms a gaseous product is an example of a(n)________. A) oxidation-reduction reaction B) combustion reaction C) precipitation reaction D) gas evolution reaction E) none of the above

gas evolution reaction