An analysis of a Solvay plant show that for every 4.30 tons of NaCl consumed,4.75 tons of NaHCO3 is obtained.What is the % efficiency of this process for converting NaCl to NaHCO3?

A) 76.8% B) 61.8% C) 63.0% D) 158% E) 90.5% A) 76.8% B) 61.8% C) 63.0% D) 158% E) 90.5%

A sample of water has hardness expressed as 160 ppm Ca2+(aq).The sample is passed through an ion exchange column and the Ca2+(aq)ions are replaced by Na+(aq)ions.What is the [Na+] in ppm of the water after it has been treated? (1 ppm = 1 g solute/106 g solution)

A) 46.0 ppm B) 92 ppm C) 184 ppm D) 320 ppm E) 80.0 ppm A) 46.0 ppm B) 92 ppm C) 184 ppm D) 320 ppm E) 80.0 ppm

What mass of borax [Na2B4O7(H2O)10] could be prepared from 25 kg of colemanite ore [Ca2B6O11(H2O)5] by a process that is 95% efficient,assuming that no other boron-containing product is formed?

A) 47 kg B) 42 kg C) 33 kg D) 31 kg E) 20 kg A) 47 kg B) 42 kg C) 33 kg D) 31 kg E) 20 kg

Exam 21: Chemistry of the Main-Group Elements I: Groups 1,2,13,and 14

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What volume of oxygen gas,measured at STP,would be required for the preparation of 39.0 g of sodium peroxide from sufficient sodium metal?

(Multiple Choice)

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Question 81

Graphite and diamond are:

(Multiple Choice)

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Question 82

Strontium hydroxide is classified as "basic."

(True/False)

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Question 83

Write the equation for the electrolysis of molten NaCl.

(Multiple Choice)

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Question 84

Which of the following is an indication that aluminum is a strong reducing agent?

(Multiple Choice)

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Question 85

Which of the following metals has been used commercially in certain drain cleaners,along with solid sodium hydroxide,for the purpose of generating hydrogen gas by reaction with hydroxide ion after contact with water?

(Multiple Choice)

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Question 86

An analysis of a Solvay plant show that for every 4.30 tons of NaCl consumed,4.75 tons of NaHCO₃ is obtained.What is the % efficiency of this process for converting NaCl to NaHCO₃?

(Multiple Choice)

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Question 87

A sample of water has hardness expressed as 160 ppm Ca²⁺(aq).The sample is passed through an ion exchange column and the Ca²⁺(aq)ions are replaced by Na⁺(aq)ions.What is the [Na⁺] in ppm of the water after it has been treated? (1 ppm = 1 g solute/10⁶ g solution)

(Multiple Choice)

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Question 88

The only by-product obtained in the Solvay process is:

(Multiple Choice)

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Question 89

Choose the INCORRECT statement.

(Multiple Choice)

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Question 90

Choose the INCORRECT statement.

(Multiple Choice)

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Question 91

Which hydroxide is significantly more soluble in 0.10 M NaOH than in pure water?

(Multiple Choice)

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Question 92

Which of the following react with water without the formation of H₂ gas as a product?

(Multiple Choice)

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Question 93

Choose the INCORRECT statement.

(Multiple Choice)

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Question 94

Which of the following statements about lithium is FALSE?

(Multiple Choice)

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Question 95

Choose the INCORRECT statement.

(Multiple Choice)

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Question 96

What mass of borax [Na₂B₄O₇(H₂O)₁₀] could be prepared from 25 kg of colemanite ore [Ca₂B₆O₁₁(H₂O)₅] by a process that is 95% efficient,assuming that no other boron-containing product is formed?

(Multiple Choice)

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Question 97

Which of the following metal hydroxides has the lowest solubility?

(Multiple Choice)

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Question 98

How much tin is required to make a pewter dish if the dish is 85% Sn and weighs 185 g?

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Question 99

Strontium is a softer metal than calcium.

(True/False)

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Question 100

Showing 81 - 100 of 116

Exam 21: Chemistry of the Main-Group Elements I: Groups 1,2,13,and 14

What volume of oxygen gas,measured at STP,would be required for the preparation of 39.0 g of sodium peroxide from sufficient sodium metal?

Graphite and diamond are:

Strontium hydroxide is classified as "basic."

Write the equation for the electrolysis of molten NaCl.

Which of the following is an indication that aluminum is a strong reducing agent?

Which of the following metals has been used commercially in certain drain cleaners,along with solid sodium hydroxide,for the purpose of generating hydrogen gas by reaction with hydroxide ion after contact with water?

An analysis of a Solvay plant show that for every 4.30 tons of NaCl consumed,4.75 tons of NaHCO3 is obtained.What is the % efficiency of this process for converting NaCl to NaHCO3?

A sample of water has hardness expressed as 160 ppm Ca2+(aq).The sample is passed through an ion exchange column and the Ca2+(aq)ions are replaced by Na+(aq)ions.What is the [Na+] in ppm of the water after it has been treated? (1 ppm = 1 g solute/106 g solution)

The only by-product obtained in the Solvay process is:

Choose the INCORRECT statement.

Choose the INCORRECT statement.

Which hydroxide is significantly more soluble in 0.10 M NaOH than in pure water?

Which of the following react with water without the formation of H2 gas as a product?

Choose the INCORRECT statement.

Which of the following statements about lithium is FALSE?

Choose the INCORRECT statement.

What mass of borax [Na2B4O7(H2O)10] could be prepared from 25 kg of colemanite ore [Ca2B6O11(H2O)5] by a process that is 95% efficient,assuming that no other boron-containing product is formed?

Which of the following metal hydroxides has the lowest solubility?

How much tin is required to make a pewter dish if the dish is 85% Sn and weighs 185 g?

Strontium is a softer metal than calcium.

Matter: Its Properties and Measurement

Atoms and the Atomic Theory

Chemical Compounds

Chemical Reactions

Introduction to Reactions in Aqueous Solutions

Gases

Thermochemistry

Electrons in Atoms

The Periodic Table and Some Atomic Properties

Chemical Bonding I: Basic Concepts

Chemical Bonding Ii: Valence Bond and Molecular Orbital Theories

Intermolecular Forces: Liquids and Solids

Spontaneous Change: Entropy and Gibbs Energy

Solutions and Their Physical Properties

Principles of Chemical Equilibrium

Acids and Bases

Additional Aspects of Acidbase Equilibria

Solubility and Complex-Ion Equilibria

Electrochemistry

Chemical Kinetics

Chemistry of the Main-Group Elements Ii: Groups 18,17,16,15,and Hydrogen

The Transition Elements

Complex Ions and Coordination Compounds

Nuclear Chemistry

Structures of Organic Compounds

Reactions of Organic Compounds

Chemistry of the Living State

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An analysis of a Solvay plant show that for every 4.30 tons of NaCl consumed,4.75 tons of NaHCO₃ is obtained.What is the % efficiency of this process for converting NaCl to NaHCO₃?

A sample of water has hardness expressed as 160 ppm Ca²⁺(aq).The sample is passed through an ion exchange column and the Ca²⁺(aq)ions are replaced by Na⁺(aq)ions.What is the [Na⁺] in ppm of the water after it has been treated? (1 ppm = 1 g solute/10⁶ g solution)

Which of the following react with water without the formation of H₂ gas as a product?

What mass of borax [Na₂B₄O₇(H₂O)₁₀] could be prepared from 25 kg of colemanite ore [Ca₂B₆O₁₁(H₂O)₅] by a process that is 95% efficient,assuming that no other boron-containing product is formed?