Consider the reaction between acetylene, C2H2, and oxygen in a welding torch: 2C2H2(g)+ 5O2(g)→ 4CO2(g)+ 2H2O(g)If 5.4 moles of acetylene react with sufficient oxygen, how many grams of CO2 should form?

A) 2.4 x 102 g B) 9.5 x 102 g C) 4.8 x 102 g D) 1.5 x 102 g E) 0.49 g A) 2.4 x 102 g B) 9.5 x 102 g C) 4.8 x 102 g D) 1.5 x 102 g E) 0.49 g C

Phosphine, PH3, a reactive and poisonous compound, reacts with oxygen as follows: 4PH3(g)+ 8O2(g)→ P4O10(s)+ 6H2O(g)If 9.2 moles of phosphine react with sufficient oxygen, how many moles of P4O10 should form?

A) 4.0 moles B) 9.2 moles C) 37 moles D) 2.3 moles E) 6.0 moles A) 4.0 moles B) 9.2 moles C) 37 moles D) 2.3 moles E) 6.0 moles

The figure shows a molecular-level diagram of reactant molecules for the reaction 2H2(g)+ O2(g)→ 2H2O(l) List the number and formulas of the molecules that should be present after the reaction takes place.

A) 2H2O + 6H2 + 2O2 B) 3H2O + 5H2 + O2 C) 4H2O + 4H2 + O2 D) 6H2O + 2H2 + O2 E) 6H2O + 2H2 A) 2H2O + 6H2 + 2O2 B) 3H2O + 5H2 + O2 C) 4H2O + 4H2 + O2 D) 6H2O + 2H2 + O2 E) 6H2O + 2H2

Consider the reaction between sodium metal and chlorine gas to form sodium chloride (table salt): 2Na(s)+ Cl2(g)→ 2NaCl(s)If the mass of the sodium solid increases by 0.500 g, what mass of sodium metal should have reacted?

A) 0.250 g B) 0.500 g C) 0.0811 g D) 0.162 g E) 0.324 g A) 0.250 g B) 0.500 g C) 0.0811 g D) 0.162 g E) 0.324 g

Consider the reaction between hydrogen and oxygen gases to form water: 2H2(g)+ O2(g)→ 2H2O(l)Which of the following is not conserved in this reaction?

A) atoms B) moles of atoms C) moles of molecules D) mass A) atoms B) moles of atoms C) moles of molecules D) mass

When copper reacts with sulfur at high temperature, copper(I)sulfide is formed. 2Cu(s)+ S(s)→ Cu2S(s)If the mass of the Cu2S formed is 1.17 g, what mass of copper should have reacted?

A) 0.934 g B) not enough information C) 0.78 g D) 2.34 g E) 0.467 g A) 0.934 g B) not enough information C) 0.78 g D) 2.34 g E) 0.467 g

Aluminum reacts with oxygen according to the following reaction: 4Al(s)+ 3O2(g)→ 2Al2O3(s)If 24 moles of aluminum are combined with 12 moles of oxygen, how many moles of Al2O3 should form?

A) 4.0 moles B) 8.0 moles C) 6.0 moles D) 5.0 moles E) 26 moles A) 4.0 moles B) 8.0 moles C) 6.0 moles D) 5.0 moles E) 26 moles

Consider the reaction between sodium metal and chlorine gas to form sodium chloride (table salt): 2Na(s)+ Cl2(g)→ 2NaCl(s)If 3.6 moles of chlorine react with sufficient sodium, how many grams of sodium chloride should form?

A) 1.1 x 102 g B) 2.1 x 102 g C) 4.2 x 102 g D) 0.13 g E) 0.062 g A) 1.1 x 102 g B) 2.1 x 102 g C) 4.2 x 102 g D) 0.13 g E) 0.062 g

When phosphorus reacts with chlorine, phosphorus trichloride is formed according to the following equation: ___P4(s)+ ___Cl2(g)→ ___PCl3(l)(unbalanced)Balance the equation and determine how many grams of chlorine would be required to react with 21.2 g of phosphorus.

A) 12.1 g B) 48.6 g C) 37.0 g D) 148 g E) 72.8 g A) 12.1 g B) 48.6 g C) 37.0 g D) 148 g E) 72.8 g

Exam 6: Quantities in Chemical Reactions

Consider the reaction between acetylene, C₂H₂, and oxygen in a welding torch: 2C₂H₂(g)+ 5O₂(g)→ 4CO₂(g)+ 2H₂O(g)If 5.4 moles of acetylene react with sufficient oxygen, how many grams of CO₂ should form?

Free

(Multiple Choice)

4.9/5

(46)

Question 1

Correct Answer:

Verified

When sodium sulfate, Na₂SO₄, dissolves in water, the ions that are formed for each formula unit that dissolves are:

Free

(Multiple Choice)

4.7/5

(34)

Question 2

Correct Answer:

Verified

The coefficients of a balanced equation can be understood to represent either relative numbers of molecules or moles.

Free

(True/False)

4.9/5

(36)

Question 3

Correct Answer:

Verified

True

Phosphine, PH₃, a reactive and poisonous compound, reacts with oxygen as follows: 4PH₃(g)+ 8O₂(g)→ P₄O₁₀(s)+ 6H₂O(g)If 9.2 moles of phosphine react with sufficient oxygen, how many moles of P₄O₁₀ should form?

(Multiple Choice)

4.8/5

(40)

Question 4

The figure shows a molecular-level diagram of reactant molecules for the reaction 2H₂(g)+ O₂(g)→ 2H₂O(l) List the number and formulas of the molecules that should be present after the reaction takes place.

(Multiple Choice)

4.9/5

(40)

Question 5

Consider the reaction between sodium metal and chlorine gas to form sodium chloride (table salt): 2Na(s)+ Cl₂(g)→ 2NaCl(s)If the mass of the sodium solid increases by 0.500 g, what mass of sodium metal should have reacted?

(Multiple Choice)

4.8/5

(36)

Question 6

Consider the reaction between hydrogen and oxygen gases to form water: 2H₂(g)+ O₂(g)→ 2H₂O(l)Which of the following is not conserved in this reaction?

(Multiple Choice)

4.7/5

(40)

Question 7

When copper reacts with sulfur at high temperature, copper(I)sulfide is formed. 2Cu(s)+ S(s)→ Cu₂S(s)If the mass of the Cu₂S formed is 1.17 g, what mass of copper should have reacted?

(Multiple Choice)

4.8/5

(30)

Question 8

The combustion of octane is described by the following balanced equation: 2C₈H₁₈(l)+ 25O₂(g)→ 16CO₂(g)+ 18H₂O(g)If 50.0 g of each reactant are available to react, how much CO₂ should form? Report your answer with the correct number of significant figures and correct units.

(Short Answer)

4.8/5

(39)

Question 9

Aluminum reacts with oxygen according to the following reaction: 4Al(s)+ 3O₂(g)→ 2Al₂O₃(s)If 24 moles of aluminum are combined with 12 moles of oxygen, how many moles of Al₂O₃ should form?

(Multiple Choice)

4.9/5

(40)

Question 10

Which of the following equations is balanced?

(Multiple Choice)

4.8/5

(34)

Question 11

Which of the following processes is exothermic?

(Multiple Choice)

4.8/5

(23)

Question 12

If you have eight bicycle wheels and five frames, how many bikes could you build (assuming that each bike requires one frame and two wheels), and what would be left over?

(Multiple Choice)

4.9/5

(41)

Question 13

The limiting reactant in a chemical reaction is always the reactant which is present in the least amount in terms of mass.

(True/False)

4.8/5

(38)

Question 14

Consider the following specific heats of metals. If the same amount of heat is added to 50.0 g of each of these metals, all at the same initial temperature, which metal will have the lowest final temperature?

(Multiple Choice)

4.9/5

(42)

Question 15

Consider the reaction between sodium metal and chlorine gas to form sodium chloride (table salt): 2Na(s)+ Cl₂(g)→ 2NaCl(s)If 3.6 moles of chlorine react with sufficient sodium, how many grams of sodium chloride should form?

(Multiple Choice)

4.9/5

(42)

Question 16

An equal quantity of heat is transferred to 10.0 g samples of different substances. Given their specific heat values, rank the substances in order from least to greatest final temperature.

(Multiple Choice)

4.9/5

(33)

Question 17

When phosphorus reacts with chlorine, phosphorus trichloride is formed according to the following equation: _P₄(s)+ _Cl₂(g)→ ___PCl₃(l)(unbalanced)Balance the equation and determine how many grams of chlorine would be required to react with 21.2 g of phosphorus.

(Multiple Choice)

4.9/5

(40)

Question 18

What is the heat change when a 53.5 g sample of water [C_water = 4.184 J/(g°C)] is cooled from 98.0°C to 23.2°C?

(Multiple Choice)

4.9/5

(38)

Question 19

A 3.50 g sample of rice was burned in a bomb calorimeter containing 1980 g of water. The temperature of the water increased from 22.75°C to 28.88°C. How much heat, in joules, did the rice sample release when it burned? [C_water = 4.184 J/(g°C)]

(Multiple Choice)

4.9/5

(38)

Question 20

Showing 1 - 20 of 133

Consider the reaction between acetylene, C₂H₂, and oxygen in a welding torch: 2C₂H₂(g)+ 5O₂(g)→ 4CO₂(g)+ 2H₂O(g)If 5.4 moles of acetylene react with sufficient oxygen, how many grams of CO₂ should form?

When sodium sulfate, Na₂SO₄, dissolves in water, the ions that are formed for each formula unit that dissolves are:

The coefficients of a balanced equation can be understood to represent either relative numbers of molecules or moles.

Phosphine, PH₃, a reactive and poisonous compound, reacts with oxygen as follows: 4PH₃(g)+ 8O₂(g)→ P₄O₁₀(s)+ 6H₂O(g)If 9.2 moles of phosphine react with sufficient oxygen, how many moles of P₄O₁₀ should form?

The figure shows a molecular-level diagram of reactant molecules for the reaction 2H₂(g)+ O₂(g)→ 2H₂O(l) List the number and formulas of the molecules that should be present after the reaction takes place.

Consider the reaction between sodium metal and chlorine gas to form sodium chloride (table salt): 2Na(s)+ Cl₂(g)→ 2NaCl(s)If the mass of the sodium solid increases by 0.500 g, what mass of sodium metal should have reacted?

Consider the reaction between hydrogen and oxygen gases to form water: 2H₂(g)+ O₂(g)→ 2H₂O(l)Which of the following is not conserved in this reaction?

When copper reacts with sulfur at high temperature, copper(I)sulfide is formed. 2Cu(s)+ S(s)→ Cu₂S(s)If the mass of the Cu₂S formed is 1.17 g, what mass of copper should have reacted?

The combustion of octane is described by the following balanced equation: 2C₈H₁₈(l)+ 25O₂(g)→ 16CO₂(g)+ 18H₂O(g)If 50.0 g of each reactant are available to react, how much CO₂ should form? Report your answer with the correct number of significant figures and correct units.

Aluminum reacts with oxygen according to the following reaction: 4Al(s)+ 3O₂(g)→ 2Al₂O₃(s)If 24 moles of aluminum are combined with 12 moles of oxygen, how many moles of Al₂O₃ should form?

Which of the following equations is balanced?

Which of the following processes is exothermic?

If you have eight bicycle wheels and five frames, how many bikes could you build (assuming that each bike requires one frame and two wheels), and what would be left over?

The limiting reactant in a chemical reaction is always the reactant which is present in the least amount in terms of mass.

Consider the following specific heats of metals. If the same amount of heat is added to 50.0 g of each of these metals, all at the same initial temperature, which metal will have the lowest final temperature?

Consider the reaction between sodium metal and chlorine gas to form sodium chloride (table salt): 2Na(s)+ Cl₂(g)→ 2NaCl(s)If 3.6 moles of chlorine react with sufficient sodium, how many grams of sodium chloride should form?

An equal quantity of heat is transferred to 10.0 g samples of different substances. Given their specific heat values, rank the substances in order from least to greatest final temperature.

When phosphorus reacts with chlorine, phosphorus trichloride is formed according to the following equation: _P₄(s)+ _Cl₂(g)→ ___PCl₃(l)(unbalanced)Balance the equation and determine how many grams of chlorine would be required to react with 21.2 g of phosphorus.

What is the heat change when a 53.5 g sample of water [C_water = 4.184 J/(g°C)] is cooled from 98.0°C to 23.2°C?

A 3.50 g sample of rice was burned in a bomb calorimeter containing 1980 g of water. The temperature of the water increased from 22.75°C to 28.88°C. How much heat, in joules, did the rice sample release when it burned? [C_water = 4.184 J/(g°C)]

Matter and Energy

Atoms, Ions, and the Periodic Table

Chemical Compounds

Chemical Composition

Chemical Reactions and Equations

Electron Structure of the Atom

Chemical Bonding

The Gaseous State

The Liquid and Solid States

Solutions

Reaction Rates and Chemical Equilibrium

Acids and Bases

Oxidation-Reduction Reactions

Nuclear Chemistry

Organic Chemistry

Biochemistry

Filters

Exam 6: Quantities in Chemical Reactions

Consider the reaction between acetylene, C2H2, and oxygen in a welding torch: 2C2H2(g)+ 5O2(g)→ 4CO2(g)+ 2H2O(g)If 5.4 moles of acetylene react with sufficient oxygen, how many grams of CO2 should form?

When sodium sulfate, Na2SO4, dissolves in water, the ions that are formed for each formula unit that dissolves are:

The coefficients of a balanced equation can be understood to represent either relative numbers of molecules or moles.

Phosphine, PH3, a reactive and poisonous compound, reacts with oxygen as follows: 4PH3(g)+ 8O2(g)→ P4O10(s)+ 6H2O(g)If 9.2 moles of phosphine react with sufficient oxygen, how many moles of P4O10 should form?

The figure shows a molecular-level diagram of reactant molecules for the reaction 2H2(g)+ O2(g)→ 2H2O(l) List the number and formulas of the molecules that should be present after the reaction takes place.

Consider the reaction between sodium metal and chlorine gas to form sodium chloride (table salt): 2Na(s)+ Cl2(g)→ 2NaCl(s)If the mass of the sodium solid increases by 0.500 g, what mass of sodium metal should have reacted?

Consider the reaction between hydrogen and oxygen gases to form water: 2H2(g)+ O2(g)→ 2H2O(l)Which of the following is not conserved in this reaction?

When copper reacts with sulfur at high temperature, copper(I)sulfide is formed. 2Cu(s)+ S(s)→ Cu2S(s)If the mass of the Cu2S formed is 1.17 g, what mass of copper should have reacted?

The combustion of octane is described by the following balanced equation: 2C8H18(l)+ 25O2(g)→ 16CO2(g)+ 18H2O(g)If 50.0 g of each reactant are available to react, how much CO2 should form? Report your answer with the correct number of significant figures and correct units.

Aluminum reacts with oxygen according to the following reaction: 4Al(s)+ 3O2(g)→ 2Al2O3(s)If 24 moles of aluminum are combined with 12 moles of oxygen, how many moles of Al2O3 should form?

Which of the following equations is balanced?

Which of the following processes is exothermic?

If you have eight bicycle wheels and five frames, how many bikes could you build (assuming that each bike requires one frame and two wheels), and what would be left over?

The limiting reactant in a chemical reaction is always the reactant which is present in the least amount in terms of mass.

Consider the following specific heats of metals. If the same amount of heat is added to 50.0 g of each of these metals, all at the same initial temperature, which metal will have the lowest final temperature?

Consider the reaction between sodium metal and chlorine gas to form sodium chloride (table salt): 2Na(s)+ Cl2(g)→ 2NaCl(s)If 3.6 moles of chlorine react with sufficient sodium, how many grams of sodium chloride should form?

An equal quantity of heat is transferred to 10.0 g samples of different substances. Given their specific heat values, rank the substances in order from least to greatest final temperature.

When phosphorus reacts with chlorine, phosphorus trichloride is formed according to the following equation: ___P4(s)+ ___Cl2(g)→ ___PCl3(l)(unbalanced)Balance the equation and determine how many grams of chlorine would be required to react with 21.2 g of phosphorus.

What is the heat change when a 53.5 g sample of water [Cwater = 4.184 J/(g°C)] is cooled from 98.0°C to 23.2°C?

A 3.50 g sample of rice was burned in a bomb calorimeter containing 1980 g of water. The temperature of the water increased from 22.75°C to 28.88°C. How much heat, in joules, did the rice sample release when it burned? [Cwater = 4.184 J/(g°C)]

Matter and Energy

Atoms, Ions, and the Periodic Table

Chemical Compounds

Chemical Composition

Chemical Reactions and Equations

Electron Structure of the Atom

Chemical Bonding

The Gaseous State

The Liquid and Solid States

Solutions

Reaction Rates and Chemical Equilibrium

Acids and Bases

Oxidation-Reduction Reactions

Nuclear Chemistry

Organic Chemistry

Biochemistry

Filters

Consider the reaction between acetylene, C₂H₂, and oxygen in a welding torch: 2C₂H₂(g)+ 5O₂(g)→ 4CO₂(g)+ 2H₂O(g)If 5.4 moles of acetylene react with sufficient oxygen, how many grams of CO₂ should form?

When sodium sulfate, Na₂SO₄, dissolves in water, the ions that are formed for each formula unit that dissolves are:

Phosphine, PH₃, a reactive and poisonous compound, reacts with oxygen as follows: 4PH₃(g)+ 8O₂(g)→ P₄O₁₀(s)+ 6H₂O(g)If 9.2 moles of phosphine react with sufficient oxygen, how many moles of P₄O₁₀ should form?

The figure shows a molecular-level diagram of reactant molecules for the reaction 2H₂(g)+ O₂(g)→ 2H₂O(l) List the number and formulas of the molecules that should be present after the reaction takes place.

Consider the reaction between sodium metal and chlorine gas to form sodium chloride (table salt): 2Na(s)+ Cl₂(g)→ 2NaCl(s)If the mass of the sodium solid increases by 0.500 g, what mass of sodium metal should have reacted?

Consider the reaction between hydrogen and oxygen gases to form water: 2H₂(g)+ O₂(g)→ 2H₂O(l)Which of the following is not conserved in this reaction?

When copper reacts with sulfur at high temperature, copper(I)sulfide is formed. 2Cu(s)+ S(s)→ Cu₂S(s)If the mass of the Cu₂S formed is 1.17 g, what mass of copper should have reacted?

The combustion of octane is described by the following balanced equation: 2C₈H₁₈(l)+ 25O₂(g)→ 16CO₂(g)+ 18H₂O(g)If 50.0 g of each reactant are available to react, how much CO₂ should form? Report your answer with the correct number of significant figures and correct units.

Aluminum reacts with oxygen according to the following reaction: 4Al(s)+ 3O₂(g)→ 2Al₂O₃(s)If 24 moles of aluminum are combined with 12 moles of oxygen, how many moles of Al₂O₃ should form?

Consider the reaction between sodium metal and chlorine gas to form sodium chloride (table salt): 2Na(s)+ Cl₂(g)→ 2NaCl(s)If 3.6 moles of chlorine react with sufficient sodium, how many grams of sodium chloride should form?

When phosphorus reacts with chlorine, phosphorus trichloride is formed according to the following equation: _P₄(s)+ _Cl₂(g)→ ___PCl₃(l)(unbalanced)Balance the equation and determine how many grams of chlorine would be required to react with 21.2 g of phosphorus.

What is the heat change when a 53.5 g sample of water [C_water = 4.184 J/(g°C)] is cooled from 98.0°C to 23.2°C?

A 3.50 g sample of rice was burned in a bomb calorimeter containing 1980 g of water. The temperature of the water increased from 22.75°C to 28.88°C. How much heat, in joules, did the rice sample release when it burned? [C_water = 4.184 J/(g°C)]