The molecular formula of aspartame, the generic name of NutraSweet®, is C14H18N2O5. The molar mass of aspartame, rounded to the nearest integer, is __________ g.

A) 24 B) 156 C) 294 D) 43 E) 39 A) 24 B) 156 C) 294 D) 43 E) 39

When the following equation is balanced, the coefficient of Al2O3 is __________. Al2O3 (s)+ C (s)+ Cl2 (g)→ AlCl3 (s)+ CO (g)

A) 1 B) 2 C) 3 D) 4 E) 5 A) 1 B) 2 C) 3 D) 4 E) 5

Solid aluminum and gaseous oxygen react in a combination reaction to produce aluminum oxide: 4Al (s)+ 3 O2 (g)→ 2 Al2O3 (s) In a particular experiment, the reaction of 2.5 g of Al with 2.5 g of O2 produced 3.5 g of Al2O3. The % yield of the reaction is __________.

A) 74 B) 37 C) 47 D) 66 E) 26 A) 74 B) 37 C) 47 D) 66 E) 26

How many moles of sodium carbonate contain 1.773 × 1017 carbon atoms?

A) 5.890 × 10-7 B) 2.945 × 10-7 C) 1.473 × 10-7 D) 8.836 × 10-7 E) 9.817 × 10-8 A) 5.890 × 10-7 B) 2.945 × 10-7 C) 1.473 × 10-7 D) 8.836 × 10-7 E) 9.817 × 10-8

A 30.5 gram sample of glucose (C6H12O6)contains __________ atoms of carbon.

A) 1.02 x 1023 B) 6.12 x 1023 C) 6.02 x 1023 D) 2.04 x 1023 E) 1.22 x 1024 A) 1.02 x 1023 B) 6.12 x 1023 C) 6.02 x 1023 D) 2.04 x 1023 E) 1.22 x 1024

Combustion of a 1.031-g sample of a compound containing only carbon, hydrogen, and oxygen produced 2.265 g of CO2 and 1.236 g of H2O. What is the empirical formula of the compound?

A) C3H8O B) C3H5O C) C6H16O2 D) C3H9O3 E) C3H6O3 A) C3H8O B) C3H5O C) C6H16O2 D) C3H9O3 E) C3H6O3

How many grams of hydrogen are in 23 g of CH4O?

A) 2.9 B) 4.6 C) 2.3 D) 4.0 E) 5.8 A) 2.9 B) 4.6 C) 2.3 D) 4.0 E) 5.8

Lithium and nitrogen react in a combination reaction to produce lithium nitride: 6Li (s)+ N2 (g)→ 2Li3N (s) In a particular experiment, 5.50-g samples of each reagent are reacted. The theoretical yield of lithium nitride is __________ g.

A) 5.53 B) 4.60 C) 27.6 D) 9.20 E) 13.7 A) 5.53 B) 4.60 C) 27.6 D) 9.20 E) 13.7

Calcium carbide (CaC2)reacts with water to produce acetylene (C2H2): CaC2 (s)+ 2 H2O (g)→ Ca(OH)2 (s)+ C2H2 (g) The complete reaction of 57.4 g of CaC2 requires consumption of __________ g of H2O.

A) 0.895 B) 64.1 C) 32.3 D) 1.79 E) 18.0 A) 0.895 B) 64.1 C) 32.3 D) 1.79 E) 18.0

The formula weight of ammonium sulfate ((NH4)O2SO4), rounded to the nearest integer, is __________ amu.

A) 100 B) 118 C) 116 D) 132 E) 264 A) 100 B) 118 C) 116 D) 132 E) 264

Calcium oxide reacts with water in a combination reaction to produce calcium hydroxide: CaO (s)+ H2O (l)→ Ca(OH)2 (s) In a particular experiment, a 1.50-g sample of CaO is reacted with excess water and 1.48 g of Ca(OH)2 is recovered. What is the percent yield in this experiment?

A) 99 B) 0.99 C) 2.16 D) 74.8 E) 101.2 A) 99 B) 0.99 C) 2.16 D) 74.8 E) 101.2

The formula weight of aluminum sulfate (Al2(SO4)3)is __________ amu.

A) 342.15 B) 123.04 C) 59.04 D) 150.14 E) 273.06 A) 342.15 B) 123.04 C) 59.04 D) 150.14 E) 273.06

The formula weight of lead (II)carbonate (PbCO3)is __________ amu.

A) 207.2 B) 219.2 C) 235.2 D) 267.2 E) 273.2 A) 207.2 B) 219.2 C) 235.2 D) 267.2 E) 273.2

Exam 3: Stoichiometry: Calculations With Chemical Formulas and Equations

The molecular formula of aspartame, the generic name of NutraSweet^®, is C₁₄H₁₈N₂O₅. The molar mass of aspartame, rounded to the nearest integer, is __________ g.

(Multiple Choice)

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Question 41

When the following equation is balanced, the coefficient of Al₂O₃ is __________. Al₂O₃ (s)+ C (s)+ Cl₂ (g)→ AlCl₃ (s)+ CO (g)

(Multiple Choice)

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Question 42

Solid aluminum and gaseous oxygen react in a combination reaction to produce aluminum oxide: 4Al (s)+ 3 O₂ (g)→ 2 Al₂O₃ (s) In a particular experiment, the reaction of 2.5 g of Al with 2.5 g of O₂ produced 3.5 g of Al₂O₃. The % yield of the reaction is __________.

(Multiple Choice)

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Question 43

When the following equation is balanced, the coefficient of hydrogen is __________. K (s)+ H₂O (l)→ KOH (aq)+ H₂ (g)

(Multiple Choice)

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Question 44

How many moles of sodium carbonate contain 1.773 × 10¹⁷ carbon atoms?

(Multiple Choice)

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Question 45

What is the empirical formula of a compound that is 52.1% C, 13.1% H, and 34.7% O by mass?

(Multiple Choice)

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Question 46

A 30.5 gram sample of glucose (C₆H₁₂O₆)contains __________ atoms of carbon.

(Multiple Choice)

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Question 47

Calculate the percentage by mass of nitrogen in Pb(NO₃)₂.

(Multiple Choice)

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Question 48

Combustion of a 1.031-g sample of a compound containing only carbon, hydrogen, and oxygen produced 2.265 g of CO₂ and 1.236 g of H₂O. What is the empirical formula of the compound?

(Multiple Choice)

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Question 49

How many grams of hydrogen are in 23 g of CH₄O?

(Multiple Choice)

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Question 50

What is the empirical formula of a compound that contains 27.0% S, 13.4% O, and 59.6% Cl by mass?

(Multiple Choice)

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Question 51

Lithium and nitrogen react in a combination reaction to produce lithium nitride: 6Li (s)+ N₂ (g)→ 2Li₃N (s) In a particular experiment, 5.50-g samples of each reagent are reacted. The theoretical yield of lithium nitride is __________ g.

(Multiple Choice)

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Question 52

Calcium carbide (CaC₂)reacts with water to produce acetylene (C₂H₂): CaC₂ (s)+ 2 H₂O (g)→ Ca(OH)₂ (s)+ C₂H₂ (g) The complete reaction of 57.4 g of CaC₂ requires consumption of __________ g of H₂O.

(Multiple Choice)

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Question 53

The formula weight of ammonium sulfate ((NH₄)O₂SO₄), rounded to the nearest integer, is __________ amu.

(Multiple Choice)

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Question 54

Calcium oxide reacts with water in a combination reaction to produce calcium hydroxide: CaO (s)+ H₂O (l)→ Ca(OH)₂ (s) In a particular experiment, a 1.50-g sample of CaO is reacted with excess water and 1.48 g of Ca(OH)₂ is recovered. What is the percent yield in this experiment?

(Multiple Choice)

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Question 55

The formula weight of aluminum sulfate (Al₂(SO₄)₃)is __________ amu.

(Multiple Choice)

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Question 56

Of the reactions below, which one is not a combination reaction?

(Multiple Choice)

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Question 57

If 2352 grams of FeS₂ is allowed to react with 1408 grams of O₂ according to the following equation, how many grams of Fe₂O₃ are produced? FeS₂ + O₂ → Fe₂O₃ + SO₂

(Short Answer)

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Question 58

The formula weight of lead (II)carbonate (PbCO₃)is __________ amu.

(Multiple Choice)

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Question 59

A sulfur oxide is 50.0% by mass sulfur. This molecular formula could be __________.

(Multiple Choice)

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Question 60

Showing 41 - 60 of 170

Exam 3: Stoichiometry: Calculations With Chemical Formulas and Equations

The molecular formula of aspartame, the generic name of NutraSweet®, is C14H18N2O5. The molar mass of aspartame, rounded to the nearest integer, is __________ g.

When the following equation is balanced, the coefficient of Al2O3 is __________. Al2O3 (s)+ C (s)+ Cl2 (g)→ AlCl3 (s)+ CO (g)

Solid aluminum and gaseous oxygen react in a combination reaction to produce aluminum oxide: 4Al (s)+ 3 O2 (g)→ 2 Al2O3 (s) In a particular experiment, the reaction of 2.5 g of Al with 2.5 g of O2 produced 3.5 g of Al2O3. The % yield of the reaction is __________.

When the following equation is balanced, the coefficient of hydrogen is __________. K (s)+ H2O (l)→ KOH (aq)+ H2 (g)

How many moles of sodium carbonate contain 1.773 × 1017 carbon atoms?

What is the empirical formula of a compound that is 52.1% C, 13.1% H, and 34.7% O by mass?

A 30.5 gram sample of glucose (C6H12O6)contains __________ atoms of carbon.

Calculate the percentage by mass of nitrogen in Pb(NO3)2.

Combustion of a 1.031-g sample of a compound containing only carbon, hydrogen, and oxygen produced 2.265 g of CO2 and 1.236 g of H2O. What is the empirical formula of the compound?

How many grams of hydrogen are in 23 g of CH4O?

What is the empirical formula of a compound that contains 27.0% S, 13.4% O, and 59.6% Cl by mass?

Lithium and nitrogen react in a combination reaction to produce lithium nitride: 6Li (s)+ N2 (g)→ 2Li3N (s) In a particular experiment, 5.50-g samples of each reagent are reacted. The theoretical yield of lithium nitride is __________ g.

Calcium carbide (CaC2)reacts with water to produce acetylene (C2H2): CaC2 (s)+ 2 H2O (g)→ Ca(OH)2 (s)+ C2H2 (g) The complete reaction of 57.4 g of CaC2 requires consumption of __________ g of H2O.

The formula weight of ammonium sulfate ((NH4)O2SO4), rounded to the nearest integer, is __________ amu.

Calcium oxide reacts with water in a combination reaction to produce calcium hydroxide: CaO (s)+ H2O (l)→ Ca(OH)2 (s) In a particular experiment, a 1.50-g sample of CaO is reacted with excess water and 1.48 g of Ca(OH)2 is recovered. What is the percent yield in this experiment?

The formula weight of aluminum sulfate (Al2(SO4)3)is __________ amu.

Of the reactions below, which one is not a combination reaction?

If 2352 grams of FeS2 is allowed to react with 1408 grams of O2 according to the following equation, how many grams of Fe2O3 are produced? FeS2 + O2 → Fe2O3 + SO2

The formula weight of lead (II)carbonate (PbCO3)is __________ amu.

A sulfur oxide is 50.0% by mass sulfur. This molecular formula could be __________.

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The molecular formula of aspartame, the generic name of NutraSweet^®, is C₁₄H₁₈N₂O₅. The molar mass of aspartame, rounded to the nearest integer, is __________ g.

When the following equation is balanced, the coefficient of Al₂O₃ is __________. Al₂O₃ (s)+ C (s)+ Cl₂ (g)→ AlCl₃ (s)+ CO (g)

Solid aluminum and gaseous oxygen react in a combination reaction to produce aluminum oxide: 4Al (s)+ 3 O₂ (g)→ 2 Al₂O₃ (s) In a particular experiment, the reaction of 2.5 g of Al with 2.5 g of O₂ produced 3.5 g of Al₂O₃. The % yield of the reaction is __________.

When the following equation is balanced, the coefficient of hydrogen is __________. K (s)+ H₂O (l)→ KOH (aq)+ H₂ (g)

How many moles of sodium carbonate contain 1.773 × 10¹⁷ carbon atoms?

A 30.5 gram sample of glucose (C₆H₁₂O₆)contains __________ atoms of carbon.

Calculate the percentage by mass of nitrogen in Pb(NO₃)₂.

Combustion of a 1.031-g sample of a compound containing only carbon, hydrogen, and oxygen produced 2.265 g of CO₂ and 1.236 g of H₂O. What is the empirical formula of the compound?

How many grams of hydrogen are in 23 g of CH₄O?

Lithium and nitrogen react in a combination reaction to produce lithium nitride: 6Li (s)+ N₂ (g)→ 2Li₃N (s) In a particular experiment, 5.50-g samples of each reagent are reacted. The theoretical yield of lithium nitride is __________ g.

Calcium carbide (CaC₂)reacts with water to produce acetylene (C₂H₂): CaC₂ (s)+ 2 H₂O (g)→ Ca(OH)₂ (s)+ C₂H₂ (g) The complete reaction of 57.4 g of CaC₂ requires consumption of __________ g of H₂O.

The formula weight of ammonium sulfate ((NH₄)O₂SO₄), rounded to the nearest integer, is __________ amu.

Calcium oxide reacts with water in a combination reaction to produce calcium hydroxide: CaO (s)+ H₂O (l)→ Ca(OH)₂ (s) In a particular experiment, a 1.50-g sample of CaO is reacted with excess water and 1.48 g of Ca(OH)₂ is recovered. What is the percent yield in this experiment?

The formula weight of aluminum sulfate (Al₂(SO₄)₃)is __________ amu.

If 2352 grams of FeS₂ is allowed to react with 1408 grams of O₂ according to the following equation, how many grams of Fe₂O₃ are produced? FeS₂ + O₂ → Fe₂O₃ + SO₂

The formula weight of lead (II)carbonate (PbCO₃)is __________ amu.