Phosphorus trichloride can be made by the following reaction: P4(s) + 6Cl2(g) $\rightarrow$4PCl3(l) What is the maximum amount of phosphorus trichloride that can be formed if 15 molecules of P4 are mixed with 42 molecules of chlorine?

A) 4 molecules B) 12 molecules C) 24 molecules D) 28 molecules E) 57 molecules A) 4 molecules B) 12 molecules C) 24 molecules D) 28 molecules E) 57 molecules

Consider the reaction between sodium metal and chlorine gas to form sodium chloride: 2Na(s) + Cl2(g) $\rightarrow$ 2NaCl(s) 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

Phosphine, PH3, a reactive and poisonous compound, reacts with oxygen as follows: 4PH3(g) + 8O2(g) $\rightarrow$P4O10(s) + 6H2O(g) If 15.0 g of phosphine reacts with sufficient oxygen, how many grams of P4O10 will be formed?

A) 125 g B) 31.3 g C) 5.00 x 102 g D) 18.9 g E) 75.7 g A) 125 g B) 31.3 g C) 5.00 x 102 g D) 18.9 g E) 75.7 g

Nitrogen monoxide reacts with oxygen according to the following reaction: 2NO(g) + O2(g) $\rightarrow$ 2NO2(g) If 12 moles of nitrogen monoxide are combined with 10 moles of oxygen, how many moles of NO2 should form?

A) 2 moles B) 5 moles C) 6 moles D) 10 moles E) 12 moles A) 2 moles B) 5 moles C) 6 moles D) 10 moles E) 12 moles

The following reaction absorbs 393 kJ of heat for each mole of CO2 that reacts. CO2(g) $\rightarrow$ C(s) + O2(g) This reaction

A) is endothermic and has a positive value of q B) is exothermic and has a positive value of q C) is endothermic and has a negative value of q D) is exothermic and has a negative value of q A) is endothermic and has a positive value of q B) is exothermic and has a positive value of q C) is endothermic and has a negative value of q D) is exothermic and has a negative value of q

Consider the reaction between acetylene, C2H2, and oxygen in a welding torch: 2C2H2(g) + 5O2(g) $\rightarrow$ 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

Nitrogen monoxide reacts with oxygen according to the following reaction: 2NO(g) + O2(g) $\rightarrow$2NO2(g) If 10 moles of nitrogen monoxide are combined with 4 moles of oxygen, how many moles of NO2 should form?

A) 4 moles B) 8 moles C) 10 moles D) 12 moles E) 14 moles A) 4 moles B) 8 moles C) 10 moles D) 12 moles E) 14 moles

The figure shows a molecular-level diagram of reactant molecules for the reaction: 2C2H2(g) + 5O2(g) $\rightarrow$ 4CO2(g) + 2H2O(g) List the number and formulas of the molecules that should be present after the reaction takes place.

A) 4CO2 + 2H2O B) 4CO2 + 2H2O + 2C2H2 C) 4CO2 + 2H2O + 2C2H2 + 5O2 D) 6CO2 + 3H2O + 3O2 E) 8CO2 + 4H2O + 2C2H2 A) 4CO2 + 2H2O B) 4CO2 + 2H2O + 2C2H2 C) 4CO2 + 2H2O + 2C2H2 + 5O2 D) 6CO2 + 3H2O + 3O2 E) 8CO2 + 4H2O + 2C2H2

Aluminum reacts with oxygen according to the following reaction: 4Al(s) + 3O2(g)$\rightarrow$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

Given the balanced equation 4NH3(g) + 5O2(g)$\rightarrow$4NO(g) + 6H2O(g), if 32.5 g of NH3 react with sufficient oxygen, how many grams of H2O should form?

A) 51.6 g B) 8.60 g C) 34.4 g D) 206.4 g E) 878 g A) 51.6 g B) 8.60 g C) 34.4 g D) 206.4 g E) 878 g

Exam 6: Quantities in Chemical Reactions

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)

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Question 41

When a substance cools from a high temperature to a low temperature, its heat change value will have a negative sign.

(True/False)

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Question 42

Consider the following reaction: CrCl₃(s) + KCl(s) + 2H₂SO₄(l) $\rightarrow$ KCr(SO₄)₂(s) + 4HCl(g) green white colorless purple colorless solid solid liquid solid gas When the green solid is mixed with the white solid and the colorless liquid is added, the mixture starts to bubble and fume.When all action has stopped, a wet purple solid containing solid white specks remains.Which substance is the limiting reactant?

(Multiple Choice)

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Question 43

What is the heat change when a 225 g sample of olive oil [C_water = 1.79 J/(g $\degree$ C)] is cooled from 95.8 $\degree$ C to 52.1 $\degree$ C?

(Multiple Choice)

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Question 44

Phosphorus trichloride can be made by the following reaction: P₄(s) + 6Cl₂(g) $\rightarrow$ 4PCl₃(l) What is the maximum amount of phosphorus trichloride that can be formed if 15 molecules of P₄ are mixed with 42 molecules of chlorine?

(Multiple Choice)

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Question 45

Consider the reaction between sodium metal and chlorine gas to form sodium chloride: 2Na(s) + Cl₂(g) $\rightarrow$ 2NaCl(s) Which of the following is not conserved in this reaction?

(Multiple Choice)

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Question 46

Phosphine, PH₃, a reactive and poisonous compound, reacts with oxygen as follows: 4PH₃(g) + 8O₂(g) $\rightarrow$ P₄O₁₀(s) + 6H₂O(g) If 15.0 g of phosphine reacts with sufficient oxygen, how many grams of P₄O₁₀will be formed?

(Multiple Choice)

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Question 47

Nitrogen monoxide reacts with oxygen according to the following reaction: 2NO(g) + O₂(g) $\rightarrow$ 2NO₂(g) If 12 moles of nitrogen monoxide are combined with 10 moles of oxygen, how many moles of NO₂should form?

(Multiple Choice)

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Question 48

The following reaction absorbs 393 kJ of heat for each mole of CO₂ that reacts. CO₂(g) $\rightarrow$ C(s) + O₂(g) This reaction

(Multiple Choice)

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Question 49

When mercury(II) oxide, a red crystalline solid, is heated, it decomposes to form liquid mercury and oxygen gas, according to the following equation: _HgO(s) $\rightarrow$ _Hg(l) + ___O₂(g)(unbalanced) Balance the equation and determine the mass of mercury that should be formed when 15.6 g of HgO is heated.

(Multiple Choice)

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Question 50

In the process of obtaining lead from PbS, or galena, the galena is "roasted" (heated in the presence of oxygen), so that the following reaction occurs: 2PbS(s) + 3O₂(g) $\rightarrow$ 2PbO(s) + 2SO₂(g) If 35.2 g of PbS is mixed with 15.5 g of oxygen, how many grams of PbO should form?

(Multiple Choice)

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Question 51

Which of the following is the best (simplest) balanced equation to represent the chemical reaction shown in the figure on any scale?

(Multiple Choice)

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Question 52

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

(Multiple Choice)

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Question 53

A 2.50 g sample of pitted prunes was burned in a bomb calorimeter containing 2110 g of water.The temperature of the water increased from 22.50 $\degree$ C to 25.76 $\degree$ C.How much heat, in joules, did the prune sample release when it burned? [C_water = 4.184 J/(g $\degree$ C)]

(Multiple Choice)

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Question 54

Nitrogen monoxide reacts with oxygen according to the following reaction: 2NO(g) + O₂(g) $\rightarrow$ 2NO₂(g) If 10 moles of nitrogen monoxide are combined with 4 moles of oxygen, how many moles of NO₂should form?

(Multiple Choice)

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Question 55

The figure shows a molecular-level diagram of reactant molecules for the reaction: 2C₂H₂(g)+ 5O₂(g) $\rightarrow$ 4CO₂(g) + 2H₂O(g) $The figure shows a molecular-level diagram of reactant molecules for the reaction: 2C2H2(g) + 5O2(g) \rightarrow 4CO2(g) + 2H2O(g) List the number and formulas of the molecules that should be present after the reaction takes place.$ List the number and formulas of the molecules that should be present after the reaction takes place.

(Multiple Choice)

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Question 56

Aluminum reacts with oxygen according to the following reaction: 4Al(s) + 3O₂(g) $\rightarrow$ 2Al₂O₃(s) If 24 moles of aluminum are combined with 12 moles of oxygen, how many moles of Al₂O₃should form?

(Multiple Choice)

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Question 57

What is the heat change when a 26.8 g sample of water [C_water = 4.184 J/(g $\degree$ C)] is cooled from 75.6 $\degree$ C to 22.1 $\degree$ C?

(Multiple Choice)

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Question 58

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)

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Question 59

Given the balanced equation 4NH₃(g) + 5O₂(g) $\rightarrow$ 4NO(g) + 6H₂O(g), if 32.5 g of NH₃react with sufficient oxygen, how many grams of H₂O should form?

(Multiple Choice)

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Question 60

Showing 41 - 60 of 120

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 a substance cools from a high temperature to a low temperature, its heat change value will have a negative sign.

What is the heat change when a 225 g sample of olive oil [C_water = 1.79 J/(g $\degree$ C)] is cooled from 95.8 $\degree$ C to 52.1 $\degree$ C?

Phosphorus trichloride can be made by the following reaction: P₄(s) + 6Cl₂(g) $\rightarrow$ 4PCl₃(l) What is the maximum amount of phosphorus trichloride that can be formed if 15 molecules of P₄ are mixed with 42 molecules of chlorine?

Consider the reaction between sodium metal and chlorine gas to form sodium chloride: 2Na(s) + Cl₂(g) $\rightarrow$ 2NaCl(s) Which of the following is not conserved in this reaction?

Phosphine, PH₃, a reactive and poisonous compound, reacts with oxygen as follows: 4PH₃(g) + 8O₂(g) $\rightarrow$ P₄O₁₀(s) + 6H₂O(g) If 15.0 g of phosphine reacts with sufficient oxygen, how many grams of P₄O₁₀will be formed?

Nitrogen monoxide reacts with oxygen according to the following reaction: 2NO(g) + O₂(g) $\rightarrow$ 2NO₂(g) If 12 moles of nitrogen monoxide are combined with 10 moles of oxygen, how many moles of NO₂should form?

The following reaction absorbs 393 kJ of heat for each mole of CO₂ that reacts. CO₂(g) $\rightarrow$ C(s) + O₂(g) This reaction

In the process of obtaining lead from PbS, or galena, the galena is "roasted" (heated in the presence of oxygen), so that the following reaction occurs: 2PbS(s) + 3O₂(g) $\rightarrow$ 2PbO(s) + 2SO₂(g) If 35.2 g of PbS is mixed with 15.5 g of oxygen, how many grams of PbO should form?

Which of the following is the best (simplest) balanced equation to represent the chemical reaction shown in the figure on any scale?

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

A 2.50 g sample of pitted prunes was burned in a bomb calorimeter containing 2110 g of water.The temperature of the water increased from 22.50 $\degree$ C to 25.76 $\degree$ C.How much heat, in joules, did the prune sample release when it burned? [C_water = 4.184 J/(g $\degree$ C)]

Nitrogen monoxide reacts with oxygen according to the following reaction: 2NO(g) + O₂(g) $\rightarrow$ 2NO₂(g) If 10 moles of nitrogen monoxide are combined with 4 moles of oxygen, how many moles of NO₂should form?

Aluminum reacts with oxygen according to the following reaction: 4Al(s) + 3O₂(g) $\rightarrow$ 2Al₂O₃(s) If 24 moles of aluminum are combined with 12 moles of oxygen, how many moles of Al₂O₃should form?

What is the heat change when a 26.8 g sample of water [C_water = 4.184 J/(g $\degree$ C)] is cooled from 75.6 $\degree$ C to 22.1 $\degree$ C?

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?

Given the balanced equation 4NH₃(g) + 5O₂(g) $\rightarrow$ 4NO(g) + 6H₂O(g), if 32.5 g of NH₃react with sufficient oxygen, how many grams of H₂O should form?

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Chemical Compounds

Chemical Composition

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Electron Structure of the Atom

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Reaction Rates and Chemical Equilibrium

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Exam 6: Quantities in Chemical Reactions

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 a substance cools from a high temperature to a low temperature, its heat change value will have a negative sign.

What is the heat change when a 225 g sample of olive oil [Cwater = 1.79 J/(g °\degree° C)] is cooled from 95.8 °\degree° C to 52.1 °\degree° C?

Phosphorus trichloride can be made by the following reaction: P4(s) + 6Cl2(g) →\rightarrow→ 4PCl3(l) What is the maximum amount of phosphorus trichloride that can be formed if 15 molecules of P4 are mixed with 42 molecules of chlorine?

Consider the reaction between sodium metal and chlorine gas to form sodium chloride: 2Na(s) + Cl2(g) →\rightarrow→ 2NaCl(s) Which of the following is not conserved in this reaction?

Phosphine, PH3, a reactive and poisonous compound, reacts with oxygen as follows: 4PH3(g) + 8O2(g) →\rightarrow→ P4O10(s) + 6H2O(g) If 15.0 g of phosphine reacts with sufficient oxygen, how many grams of P4O10 will be formed?

Nitrogen monoxide reacts with oxygen according to the following reaction: 2NO(g) + O2(g) →\rightarrow→ 2NO2(g) If 12 moles of nitrogen monoxide are combined with 10 moles of oxygen, how many moles of NO2 should form?

The following reaction absorbs 393 kJ of heat for each mole of CO2 that reacts. CO2(g) →\rightarrow→ C(s) + O2(g) This reaction

In the process of obtaining lead from PbS, or galena, the galena is "roasted" (heated in the presence of oxygen), so that the following reaction occurs: 2PbS(s) + 3O2(g) →\rightarrow→ 2PbO(s) + 2SO2(g) If 35.2 g of PbS is mixed with 15.5 g of oxygen, how many grams of PbO should form?

Which of the following is the best (simplest) balanced equation to represent the chemical reaction shown in the figure on any scale?

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

A 2.50 g sample of pitted prunes was burned in a bomb calorimeter containing 2110 g of water.The temperature of the water increased from 22.50 °\degree° C to 25.76 °\degree° C.How much heat, in joules, did the prune sample release when it burned? [Cwater = 4.184 J/(g °\degree° C)]

Nitrogen monoxide reacts with oxygen according to the following reaction: 2NO(g) + O2(g) →\rightarrow→ 2NO2(g) If 10 moles of nitrogen monoxide are combined with 4 moles of oxygen, how many moles of NO2 should form?

The figure shows a molecular-level diagram of reactant molecules for the reaction: 2C2H2(g) + 5O2(g) →\rightarrow→ 4CO2(g) + 2H2O(g) List the number and formulas of the molecules that should be present after the reaction takes place.

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

What is the heat change when a 26.8 g sample of water [Cwater = 4.184 J/(g °\degree° C)] is cooled from 75.6 °\degree° C to 22.1 °\degree° C?

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?

Given the balanced equation 4NH3(g) + 5O2(g) →\rightarrow→ 4NO(g) + 6H2O(g), if 32.5 g of NH3 react with sufficient oxygen, how many grams of H2O should form?

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

What is the heat change when a 225 g sample of olive oil [C_water = 1.79 J/(g $\degree$ C)] is cooled from 95.8 $\degree$ C to 52.1 $\degree$ C?

Phosphorus trichloride can be made by the following reaction: P₄(s) + 6Cl₂(g) $\rightarrow$ 4PCl₃(l) What is the maximum amount of phosphorus trichloride that can be formed if 15 molecules of P₄ are mixed with 42 molecules of chlorine?

Consider the reaction between sodium metal and chlorine gas to form sodium chloride: 2Na(s) + Cl₂(g) $\rightarrow$ 2NaCl(s) Which of the following is not conserved in this reaction?

Phosphine, PH₃, a reactive and poisonous compound, reacts with oxygen as follows: 4PH₃(g) + 8O₂(g) $\rightarrow$ P₄O₁₀(s) + 6H₂O(g) If 15.0 g of phosphine reacts with sufficient oxygen, how many grams of P₄O₁₀will be formed?

Nitrogen monoxide reacts with oxygen according to the following reaction: 2NO(g) + O₂(g) $\rightarrow$ 2NO₂(g) If 12 moles of nitrogen monoxide are combined with 10 moles of oxygen, how many moles of NO₂should form?

The following reaction absorbs 393 kJ of heat for each mole of CO₂ that reacts. CO₂(g) $\rightarrow$ C(s) + O₂(g) This reaction

In the process of obtaining lead from PbS, or galena, the galena is "roasted" (heated in the presence of oxygen), so that the following reaction occurs: 2PbS(s) + 3O₂(g) $\rightarrow$ 2PbO(s) + 2SO₂(g) If 35.2 g of PbS is mixed with 15.5 g of oxygen, how many grams of PbO should form?

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

A 2.50 g sample of pitted prunes was burned in a bomb calorimeter containing 2110 g of water.The temperature of the water increased from 22.50 $\degree$ C to 25.76 $\degree$ C.How much heat, in joules, did the prune sample release when it burned? [C_water = 4.184 J/(g $\degree$ C)]

Nitrogen monoxide reacts with oxygen according to the following reaction: 2NO(g) + O₂(g) $\rightarrow$ 2NO₂(g) If 10 moles of nitrogen monoxide are combined with 4 moles of oxygen, how many moles of NO₂should form?

Aluminum reacts with oxygen according to the following reaction: 4Al(s) + 3O₂(g) $\rightarrow$ 2Al₂O₃(s) If 24 moles of aluminum are combined with 12 moles of oxygen, how many moles of Al₂O₃should form?

What is the heat change when a 26.8 g sample of water [C_water = 4.184 J/(g $\degree$ C)] is cooled from 75.6 $\degree$ C to 22.1 $\degree$ C?

Given the balanced equation 4NH₃(g) + 5O₂(g) $\rightarrow$ 4NO(g) + 6H₂O(g), if 32.5 g of NH₃react with sufficient oxygen, how many grams of H₂O should form?