The following diagrams represent the reaction of A2 (shaded spheres)with B2 (unshaded spheres).Identify the limiting reactant and write a balanced equation for the reaction.

A) A2 is the limiting reactant;A + 3 B → AB3. B) A2 is the limiting reactant;A2 + 3 B2 → 2 AB3. C) B2 is the limiting reactant;A + 3 B → AB3. D) B2 is the limiting reactant;A2 + 3 B2 → 2 AB3. A) A2 is the limiting reactant;A + 3 B → AB3. B) A2 is the limiting reactant;A2 + 3 B2 → 2 AB3. C) B2 is the limiting reactant;A + 3 B → AB3. D) B2 is the limiting reactant;A2 + 3 B2 → 2 AB3.

How many milliliters of 0.200 M FeCl3 are needed to react with an excess of Na2S to produce 1)38 g of Fe2S3 if the percent yield for the reaction is 65.0%? 3 Na2S(aq)+ 2 FeCl3(aq)→ Fe2S3(s)+ 6 NaCl(aq)

A) 25.5 mL B) 43.1 mL C) 51.1 mL D) 102 mL A) 25.5 mL B) 43.1 mL C) 51.1 mL D) 102 mL

When 125 mL of 0.500 M AgNO3 is added to 100.mL of 0.300 M NH4Cl,how many grams of AgCl are formed? AgNO3(aq)+ NH4Cl(aq)→ AgCl(s)+ NH4NO3(aq)

A) 4)30 g B) 8)96 g C) 13.3 g D) 25.8 g A) 4)30 g B) 8)96 g C) 13.3 g D) 25.8 g

What mass of phosphorus pentafluoride,PF5,has the same number of fluorine atoms as 25.0 g of oxygen difluoride,OF2?

A) 0)933 g B) 10.0 g C) 23.3 g D) 146 g A) 0)933 g B) 10.0 g C) 23.3 g D) 146 g

What is the concentration of FeCl3 in a solution prepared by dissolving 10.0 g of FeCl3 in enough water to make 275 mL of solution?

A) 2)24 × 10-4 M B) 0)224 M C) 4)46 M D) 4)46 × 103 M A) 2)24 × 10-4 M B) 0)224 M C) 4)46 M D) 4)46 × 103 M

Exam 3: Formulas, equations, and Moles

The following diagrams represent the reaction of A₂ (shaded spheres)with B₂ (unshaded spheres).Identify the limiting reactant and write a balanced equation for the reaction.

(Multiple Choice)

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Question 41

How many milliliters of 0.200 M FeCl₃ are needed to react with an excess of Na₂S to produce 1)38 g of Fe₂S₃ if the percent yield for the reaction is 65.0%? 3 Na₂S(aq)+ 2 FeCl₃(aq)→ Fe₂S₃(s)+ 6 NaCl(aq)

(Multiple Choice)

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Question 42

When 125 mL of 0.500 M AgNO₃ is added to 100.mL of 0.300 M NH₄Cl,how many grams of AgCl are formed? AgNO₃(aq)+ NH₄Cl(aq)→ AgCl(s)+ NH₄NO₃(aq)

(Multiple Choice)

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Question 43

What mass of phosphorus pentafluoride,PF₅,has the same number of fluorine atoms as 25.0 g of oxygen difluoride,OF₂?

(Multiple Choice)

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Question 44

What is the empirical formula of a substance that contains 2.64 g of C,0.444 g of H,and 3.52 g of O?

(Multiple Choice)

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Question 45

Which one of the following contains 39% carbon by mass?

(Multiple Choice)

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Question 46

How many moles of BCl₃ are needed to produce 25.0 g of HCl(aq)in the following reaction? BCl₃(g)+ 3 H₂O(l)→ 3 HCl(aq)+ B(OH)₃(aq)

(Multiple Choice)

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Question 47

The number of grams of NaCl required to prepare 500 mL of 0.100 M NaCl is ________.

(Short Answer)

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Question 48

The number of milliliters of 0.250 M HCl required to react with 50.00 mL of 0.450 M KOH in the reaction shown below is ________. HCl + KOH → H₂O + KCl

(Short Answer)

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Question 49

What volume of a 0.540 M NaOH solution contains 15.5 g of NaOH?

(Multiple Choice)

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Question 50

Which statement about diluted solutions is false? When a solution is diluted

(Multiple Choice)

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Question 51

The number of moles of CaCl₂ in 25.0 mL of 0.222 M CaCl₂ is ________.

(Short Answer)

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Question 52

What is the empirical formula of a substance that contains 2.64 g of C,0.444 g of H,and 3)52 g of O?

(Multiple Choice)

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Question 53

A hydrocarbon of unknown formula C_xH_y was submitted to combustion analysis with the following results.What is the empirical formula of the hydrocarbon?

(Multiple Choice)

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Question 54

Chemical equations are balanced in order to obey the law of

(Multiple Choice)

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Question 55

-Ethanol has the molecular formula C₂H₆O.Which ball and stick model shown above represents ethanol? [gray spheres = C,black spheres = O,unshaded spheres = H]

(Multiple Choice)

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Question 56

What is the concentration of FeCl₃ in a solution prepared by dissolving 10.0 g of FeCl₃ in enough water to make 275 mL of solution?

(Multiple Choice)

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Question 57

In an acid-base neutralization reaction 38.74 mL of 0.500 M potassium hydroxide reacts with 50)00 mL of sulfuric acid solution.What is the concentration of the H₂SO₄ solution?

(Multiple Choice)

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Question 58

Balance the chemical equation given below,and determine the number of milliliters of 0.00300 M phosphoric acid required to neutralize 45.00 mL of 0.00150 M calcium hydroxide. ___ Ca(OH)₂(aq)+ _ H₃PO₄(aq)→ _ Ca₃(PO₄)₂(aq)+ ___ H₂O(l)

(Multiple Choice)

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Question 59

Aluminum metal reacts with aqueous iron( II)chloride to form aqueous aluminum chloride and iron metal.What is the stoichiometric coefficient for aluminum when the chemical equation is balanced using the lowest whole-number stoichiometric coefficients?

(Multiple Choice)

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Question 60

Showing 41 - 60 of 208

Exam 3: Formulas, equations, and Moles

The following diagrams represent the reaction of A2 (shaded spheres)with B2 (unshaded spheres).Identify the limiting reactant and write a balanced equation for the reaction.

How many milliliters of 0.200 M FeCl3 are needed to react with an excess of Na2S to produce 1)38 g of Fe2S3 if the percent yield for the reaction is 65.0%? 3 Na2S(aq)+ 2 FeCl3(aq)→ Fe2S3(s)+ 6 NaCl(aq)

When 125 mL of 0.500 M AgNO3 is added to 100.mL of 0.300 M NH4Cl,how many grams of AgCl are formed? AgNO3(aq)+ NH4Cl(aq)→ AgCl(s)+ NH4NO3(aq)

What mass of phosphorus pentafluoride,PF5,has the same number of fluorine atoms as 25.0 g of oxygen difluoride,OF2?

What is the empirical formula of a substance that contains 2.64 g of C,0.444 g of H,and 3.52 g of O?

Which one of the following contains 39% carbon by mass?

How many moles of BCl3 are needed to produce 25.0 g of HCl(aq)in the following reaction? BCl3(g)+ 3 H2O(l)→ 3 HCl(aq)+ B(OH)3(aq)

The number of grams of NaCl required to prepare 500 mL of 0.100 M NaCl is ________.

The number of milliliters of 0.250 M HCl required to react with 50.00 mL of 0.450 M KOH in the reaction shown below is ________. HCl + KOH → H2O + KCl

What volume of a 0.540 M NaOH solution contains 15.5 g of NaOH?

Which statement about diluted solutions is false? When a solution is diluted

The number of moles of CaCl2 in 25.0 mL of 0.222 M CaCl2 is ________.

What is the empirical formula of a substance that contains 2.64 g of C,0.444 g of H,and 3)52 g of O?

A hydrocarbon of unknown formula CxHy was submitted to combustion analysis with the following results.What is the empirical formula of the hydrocarbon?

Chemical equations are balanced in order to obey the law of

-Ethanol has the molecular formula C2H6O.Which ball and stick model shown above represents ethanol? [gray spheres = C,black spheres = O,unshaded spheres = H]

What is the concentration of FeCl3 in a solution prepared by dissolving 10.0 g of FeCl3 in enough water to make 275 mL of solution?

In an acid-base neutralization reaction 38.74 mL of 0.500 M potassium hydroxide reacts with 50)00 mL of sulfuric acid solution.What is the concentration of the H2SO4 solution?

Balance the chemical equation given below,and determine the number of milliliters of 0.00300 M phosphoric acid required to neutralize 45.00 mL of 0.00150 M calcium hydroxide. _____ Ca(OH)2(aq)+ _____ H3PO4(aq)→ _____ Ca3(PO4)2(aq)+ _____ H2O(l)

Aluminum metal reacts with aqueous iron( II)chloride to form aqueous aluminum chloride and iron metal.What is the stoichiometric coefficient for aluminum when the chemical equation is balanced using the lowest whole-number stoichiometric coefficients?

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The following diagrams represent the reaction of A₂ (shaded spheres)with B₂ (unshaded spheres).Identify the limiting reactant and write a balanced equation for the reaction.

How many milliliters of 0.200 M FeCl₃ are needed to react with an excess of Na₂S to produce 1)38 g of Fe₂S₃ if the percent yield for the reaction is 65.0%? 3 Na₂S(aq)+ 2 FeCl₃(aq)→ Fe₂S₃(s)+ 6 NaCl(aq)

When 125 mL of 0.500 M AgNO₃ is added to 100.mL of 0.300 M NH₄Cl,how many grams of AgCl are formed? AgNO₃(aq)+ NH₄Cl(aq)→ AgCl(s)+ NH₄NO₃(aq)

What mass of phosphorus pentafluoride,PF₅,has the same number of fluorine atoms as 25.0 g of oxygen difluoride,OF₂?

How many moles of BCl₃ are needed to produce 25.0 g of HCl(aq)in the following reaction? BCl₃(g)+ 3 H₂O(l)→ 3 HCl(aq)+ B(OH)₃(aq)

The number of milliliters of 0.250 M HCl required to react with 50.00 mL of 0.450 M KOH in the reaction shown below is ________. HCl + KOH → H₂O + KCl

The number of moles of CaCl₂ in 25.0 mL of 0.222 M CaCl₂ is ________.

A hydrocarbon of unknown formula C_xH_y was submitted to combustion analysis with the following results.What is the empirical formula of the hydrocarbon?

-Ethanol has the molecular formula C₂H₆O.Which ball and stick model shown above represents ethanol? [gray spheres = C,black spheres = O,unshaded spheres = H]

What is the concentration of FeCl₃ in a solution prepared by dissolving 10.0 g of FeCl₃ in enough water to make 275 mL of solution?

In an acid-base neutralization reaction 38.74 mL of 0.500 M potassium hydroxide reacts with 50)00 mL of sulfuric acid solution.What is the concentration of the H₂SO₄ solution?

Balance the chemical equation given below,and determine the number of milliliters of 0.00300 M phosphoric acid required to neutralize 45.00 mL of 0.00150 M calcium hydroxide. ___ Ca(OH)₂(aq)+ _ H₃PO₄(aq)→ _ Ca₃(PO₄)₂(aq)+ ___ H₂O(l)