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Stoichiometry Solutions Library

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461 solutions

Stoichiometry

Q. Directions: You must solve each of the following problems using dimensional analysis. EVERY number in you work should be followed by a unit and a f...

Solved • Apr 20, 2021

Stoichiometry

Q. Directions: You must solve each of the following problems using dimensional analysis. EVERY number in you work should be followed by a unit and a f...

Solved • Apr 20, 2021

Stoichiometry

Q. Directions: You must solve each of the following problems using dimensional analysis. EVERY number in you work should be followed by a unit and a f...

Solved • Apr 20, 2021

Stoichiometry

Q. Which type of stoichiometric calculation does not require the use of the molar mass?a. mass-mass problemsb. mass-volume problemsc. mass-particle pr...

Solved • Apr 15, 2021

Stoichiometry

Q. Directions: You must solve each of the following problems using dimensional analysis. EVERY number in you work should be followed by a unit and a f...

Solved • Apr 6, 2021

Stoichiometry

Q. The combustion of propane may be described by the chemical equation C3H8(g) + 5 O2(g) ⟶ 3 CO2(g) + 4 H2O(g) How many grams of O2(g) are needed to c...

Solved • Apr 2, 2021

Stoichiometry

Q. In a chemical reaction, exactly 2 mol of substance A reacts to produce exactly 3 mol of substance B. How many molecules of substance B are produced...

Solved • Mar 30, 2021

Stoichiometry

Q. In the equation Al2(SO4)3+6NaOH→2Al(OH)3+3 Na2SO4, what is the mole ratio of NaOH to Al(OH)3?

Solved • Mar 30, 2021

Stoichiometry

Q. How many moles of Al are needed to react completely with 1.2 mol FeO in the reaction 2 Al + 3 FeO → 3 Fe + Al2O3?

Solved • Mar 23, 2021

Stoichiometry

Q. Which is an incorrect interpretation of this balanced equation?  2 S (s) + 3 O2(g) → 2 SO3(g) A.. 2 mol S + 3 mol O2 → 2 mol SO3 B. 2 g S + 3 g O2 ...

Solved • Mar 23, 2021

Stoichiometry

Q. Which of the following is true about the total number of reactants and the total number of products in the reaction shown below? C5H12 + 8 O2 → 5 C...

Solved • Mar 23, 2021

Stoichiometry

Q. In the reaction 2 CO + O2 → 2 CO2, what is the ratio of the moles to oxygen used to moles of CO2 produced?

Solved • Mar 23, 2021

Stoichiometry

Q. What is the measured amount of a product obtained from a chemical reaction?a. mole ratiob. percentage yieldc. theoretical yieldd. actual yield

Solved • Mar 22, 2021

Stoichiometry

Q. In the chemical reaction represented by the equation wA + xB → yC + zD a comparison of the number of moles of A to the number of moles of C would b...

Solved • Mar 22, 2021

Stoichiometry

Q. Which branch of chemistry deals with the mass relationships of elements in compounds and the mass relationships among reactants and products in che...

Solved • Mar 22, 2021

Stoichiometry

Q. When KClO3 decomposes into KCl and O22 KClO3 → 2 KCl + 3 O2If this reaction produced 50.6 g of KCl, how much O2 was produced (in grams)?

Solved • Mar 22, 2021

Stoichiometry

Q. The chemical equation for the formation of ammonia is unbalanced.3H2(g) + N2(g) → NH3(g)If three molecules of hydrogen react with one molecule of n...

Solved • Mar 17, 2021

Stoichiometry

Q. A 1.013-g sample of ZnSO4•xH2O is dissolved in an aqueous solution containing excess BaCl2. When they react, BaSO4 and ZnCl2 are formed. The pure B...

Solved • Feb 24, 2021

Stoichiometry

Q. In the body, the amino acid glycine, C2H5NO2, reacts according to the following equation:2 C2H5NO2(aq) + 3 O2(g)⟶ 3 CO2(g) (Glycine) + 3 H2O(l) + C...

Solved • Feb 9, 2021

Stoichiometry

Q. In the body, the amino acid glycine, C2H5NO2, reacts according to the following equation:2 C2H5NO2(aq) + 3 O2(g)⟶ 3 CO2(g)  + 3 H2O(l) + CH4N2O(aq)...

Solved • Feb 9, 2021

Stoichiometry

Q. Given the following reaction, how many moles of Z will be produced from 3.85 moles of A assuming excess B?2 A + 3 B → 4 Y + 5 Z

Solved • Feb 8, 2021

Stoichiometry

Q. In the body, the amino acid glycine, C2H5NO2, reacts according to the following equation:2 C2H5NO2(aq) + 3 O2(g)⟶ 3 CO2(g) + 3 H2O(l) + CH4N2O(aq) ...

Solved • Feb 5, 2021

Stoichiometry

Q. The balanced chemical equation for the combustion of propane is C3H8(g)+ 5O2(g) → 3 CO2(g)+4H2O(g) Which statement is correct about the complete co...

Solved • Feb 4, 2021

Stoichiometry

Q. Stoichiometry is best defined as the a. quantitative relationship between reactants and products in a chemical reactionb. qualitative relationship ...

Solved • Feb 3, 2021

Stoichiometry

Q. 40.0 g of C6H6 are allowed to react with 75.0 g of Br2 according to the following balanced equation: C6H6 + Br2 → C6H5Br + HBrb. How many moles of ...

Solved • Feb 1, 2021

Stoichiometry

Q. 3.70 moles of sodium hydroxide are reacted with 2.00 moles of carbon dioxide according to the balanced equation: 2 NaOH(s) + CO2(g) → Na2CO3(s) + H...

Solved • Feb 1, 2021

Stoichiometry

Q. Fe2O3(s) + CO (g) → Fe(s) + CO2 (g) b. Calculate the grams of Fe and the grams of CO2 formed when 0.1234 kg of Fe2O3 react. 

Solved • Jan 29, 2021

Stoichiometry

Q. C6H12O6(aq) → C2H5OH(aq) + CO2(g) c. How many grams of CO2 form when 7.56 g of C2H5OH are produced?

Solved • Jan 29, 2021

Stoichiometry

Q. C6H12O6(aq) → C2H5OH(aq) + CO2(g) b. How many grams of C6H12O6 are needed to make 7.56 g of C2H5OH?

Solved • Jan 29, 2021

Stoichiometry

Q. The reaction for producing glucose in plants is called photosynthesis is 6 CO2 + 6H2 O ↔ C6H12O6 +6 O2. if a plant produce 6.26 mol of C6H12O6, how...

Solved • Jan 27, 2021

Stoichiometry

Q. 40.0 g of C6H6 are allowed to react with 75.0 g of Br2 according to the following balanced equation: C6H6 + Br2 → C6H5Br + HBra. How many moles of ...

Solved • Jan 26, 2021

Stoichiometry

Q. 3.70 moles of sodium hydroxide are reacted with 2.00 moles of carbon dioxide according to the balanced equation: 2 NaOH(s) + CO2(g) → Na2CO3(s) + H...

Solved • Jan 26, 2021

Stoichiometry

Q. Fe2O3(s) + CO (g) → Fe(s) + CO2 (g) a. Calculate the number of grams of CO that can react with 0.1234 kg of Fe2O3.

Solved • Jan 26, 2021

Stoichiometry

Q. C6H12O6(aq) → C2H5OH(aq) + CO2(g) a. How many moles of CO2 are produced when 0.456 mol of C6H12O6 react in this fashion?

Solved • Jan 26, 2021

Stoichiometry

Q. When chlorine gas is bubbled into a solution of a sodium bromide, the sodium bromide reacts to give bromine, a red- brown liquid, and sodium chlori...

Solved • Nov 16, 2020

Stoichiometry

Q. 3 H2 (g) + N2 (g)→ 2 NH3(g)a. How many moles of NH3 can be produced from 13.5 mol of H2 and excess N2 ?b. How many grams of NH3 can be produced fro...

Solved • Oct 19, 2020

Stoichiometry

Q. Hydrogen gas is a very useful reagent with many uses in the petroleum, food, and chemical industries. Most hydrogen exists in covalently bonded mol...

Solved • Jul 2, 2020

Stoichiometry

Q. If you started with 0.151 mol of N2 and 0.453 mol of H2, and they completely reacted in the reaction vessel, determine the total moles of gas parti...

Solved • Jul 2, 2020

Stoichiometry

Q. How many moles of H2 can be produced from x grams of Mg in magnesium-aluminum alloy? The molar mass of Mg is 24.31 g/mol.Express your answer in ter...

Solved • Jul 2, 2020

Stoichiometry

Q. What is the theoretical yield of SO3 produced by 7.61 g of S?Express your answer numerically in grams.Elemental S reacts with O2 to form SO3 accord...

Solved • Jul 1, 2020

Stoichiometry

Q. How many O2 molecules are needed to react with 7.61 g of S?Express your answer numerically in units of molecules.Elemental S reacts with O2 to form...

Solved • Jul 1, 2020

Stoichiometry

Q. Consider the reaction2 D2(g) + O2(g) → 2 D2O(l)What is the mass of heavy water, D2O(l), produced when 4.50 g of O2(g) reacts with excess D2(g)?Expr...

Solved • Jul 1, 2020

Stoichiometry

Q. Consider the reaction2 H2(g) + O2(g) → 2 H2O(l)What is the mass of water, H2O(l), produced when 4.50 g of O2(g) reacts with excess H2(g)?Express yo...

Solved • Jul 1, 2020

Stoichiometry

Q. What mass of oxygen is needed for the complete combustion of 8.10×10−3 g of methane?Express your answer with the appropriate units.The coefficients...

Solved • Jul 1, 2020

Stoichiometry

Q. What mass of water is produced from the complete combustion of 8.10×10−3 g of methane?Express your answer with the appropriate units.The coefficien...

Solved • Jul 1, 2020

Stoichiometry

Q. What mass of carbon dioxide is produced from the complete combustion of 8.10×10−3 g of methane?Express your answer with the appropriate units.The c...

Solved • Jul 1, 2020

Stoichiometry

Q. Part A. Set up two algebraic equations, one expressing the mass of carbon dioxide produced in terms of each reagent and the other expressing the ma...

Solved • Jul 1, 2020

Stoichiometry

Q. How many molecules (not moles) of NH3 are produced from 3.41×10−4 g of H2?Express your answer numerically as the number of molecules.Reaction of hy...

Solved • Jul 1, 2020

Stoichiometry

Q. How many grams of H2 are needed to produce 11.55 g of NH3?Express your answer numerically in grams.Reaction of hydrogen and nitrogen to form ammoni...

Solved • Jul 1, 2020

Stoichiometry

Q. How many grams of NH3 can be produced from 2.58 mol of N2 and excess H2?Express your answer numerically in grams.Reaction of hydrogen and nitrogen ...

Solved • Jul 1, 2020

Stoichiometry

Q. How many moles of NH3 can be produced from 16.5 mol of H2 and excess N2?Express your answer numerically in moles.Reaction of hydrogen and nitrogen ...

Solved • Jul 1, 2020

Stoichiometry

Q. You are provided with 3.40 mol of nitrogen monoxide gas. Using the balanced chemical equation completed in Part A, determine how many moles of oxyg...

Solved • Jul 1, 2020

Stoichiometry

Q. If you had excess aluminum, how many moles of aluminum chloride could be produced from 32.0 g of chlorine gas, Cl2?In the following chemical reacti...

Solved • Jul 1, 2020

Stoichiometry

Q. If you had excess chlorine, how many moles of aluminum chloride could be produced from 27.0 g of aluminum?In the following chemical reaction, 2 mol...

Solved • Jul 1, 2020

Stoichiometry

Q. Consider the formation of HCN by the reaction of NaCN (sodium cyanide) with an acid such as H2SO4 (sulfuric acid):2 NaCN(s) + H2SO4(aq) → Na2SO4(aq...

Solved • Jul 1, 2020

Stoichiometry

Q. Part A. Given 7.80 g of butanoic acid and excess ethanol, how many grams of ethyl butyrate would be synthesized, assuming a complete 100% yield? Ex...

Solved • Jun 30, 2020

Stoichiometry

Q. A 3.045 g sample of a mixture was analyzed for barium ion by adding a small excess of sulfuric acid to an aqueous solution of the sample. The resul...

Solved • Jun 30, 2020

Stoichiometry

Q. A mixture of A and B contains a total of 5.8 mol. Both A and  B react with Z according to the following equations:A + Z → AZB + 2Z → BZ2The reactio...

Solved • Jun 25, 2020

Stoichiometry

Q. Use the balanced equation for the combustion of octane to determine how many moles of H2O are produced by the combustion of 27.0 moles of C8H18 2 C...

Solved • Jun 25, 2020

Stoichiometry

Q. The world burns the fossil fuel equivalent of 3×1012 kg of petroleum per year. Assume that all of this petroleum is in the form of octane (C8H18). ...

Solved • Jun 25, 2020

Stoichiometry

Q. The world burns the fossil fuel equivalent of 3×1012 kg of petroleum per year. Assume that all of this petroleum is in the form of octane C8H18. (a...

Solved • Jun 25, 2020

Stoichiometry

Q. Sodium reacts with oxygen to produce sodium oxide. 4 Na(s) + O2(g) → 2 Na2O(s)1. How many grams of Na2O are produced when 93.7 g of Na reacts?2. If...

Solved • Jun 15, 2020

Stoichiometry

Q. How many moles of PCl5 can be produced from 23.0 g of P4 (and excess Cl2)?

Solved • Jun 15, 2020

Stoichiometry

Q. 12.-16.In a reaction of a flare, 5 grams of magnesium were reacted.12. How many moles of magnesium were reacted? (a) 0.4 (b) 0.8 (c) 1.6 (d) 0.2 (e...

Solved • Apr 30, 2020

Stoichiometry

Q. When barium hydroxide reacts with sulfuric acid, barium sulfate and water are produced. The balanced equation for this reaction is: Ba(OH)2(aq) + H...

Solved • Apr 29, 2020

Stoichiometry

Q. How many moles of nitrogen are formed when 25.0 g of KNO3 decomposes according to the following reaction? The molar mass of KNO3 is 101.1 g/mol. 4 ...

Solved • Apr 29, 2020

Stoichiometry

Q. For each reaction, calculate the mass (in grams) of the product formed when 10.5 g of the underlined reactant completely reacts.Assume that there i...

Solved • Apr 23, 2020

Stoichiometry

Q. NaOH + KHP → NaKP + H2O (formula weight of KHP =204.2)calculate number of moles of KHP that are present in 0.693 grams of KHP.calculate number of m...

Solved • Apr 21, 2020

Stoichiometry

Q. If 12.0g of MgSO4 • 7H2O is thoroughly heated, what mass of anhydrous magnesium sulfate will remain? Express your answer to three significant figur...

Solved • Mar 18, 2020

Stoichiometry

Q. When heated, KCIO3 decomposes into KCI and O2. 2KCIO3 → 2KCl+ 3O2 If this reaction produced 50.6 g of KCI, how much O2 was produced (in grams)?

Solved • Mar 17, 2020

Stoichiometry

Q. In a chemical reaction, exactly 2 mol of substance A react to produce exactly 3 mol of substance B. 2 A → 3B How many molecules of substance B are ...

Solved • Mar 17, 2020

Stoichiometry

Q. Sodium reacts with oxygen to form sodium oxide and has the following balanced chemical equation: 4 Na + O2 → 2 Na2O. How many mole(s) of oxygen gas...

Solved • Mar 12, 2020

Stoichiometry

Q. Automotive air bags inflate when sodium azide, NaN3, rapidly decomposes into its component elements:2 NaN3(s) → 2 Na(s) + 3 N2(g)How many grams of ...

Solved • Nov 28, 2019

Stoichiometry

Q. A hydrocarbon sample with a mass of 6.0 grams underwent combustion to produce 11.0 grams of carbon dioxide. If all the carbon initially present in ...

Solved • Nov 25, 2019

Stoichiometry

Q. How many grams of oxygen are formed when 5.30 moles of KOH are formed?4 KO(s) + 2 H2O(l) → 4 KOH(s) + O2(g) A) 21.2 g O2B) 84.8 g O2C) 170 g O2D) 5...

Solved • Oct 25, 2019

Stoichiometry

Q. Automotive air bags inflate when sodium azide decomposes explosively to its constituent elements:2NaN3(s) → 2Na(s) + 3N2(g)How many grams of sodium...

Solved • Oct 25, 2019

Stoichiometry

Q. The formation of ammonia can be written as N2(g) + 3 H2(g) → 2NH3(g)How much ammonia is produced if 14.0 g of N2(g) is reacted with excess hydrogen...

Solved • Oct 3, 2019

Stoichiometry

Q. Consider the following reaction: 2 Al + 6 HCl → Al2Cl6 + 3 H2How many moles of HCl are required to produce 2.6 moles of hydrogen? Assume that there...

Solved • Oct 2, 2019

Stoichiometry

Q. Calcium carbide, CaC2, is an important preliminary chemical for industries producing synthetic fabrics and plastics. CaC2 may be produced by heatin...

Solved • Oct 1, 2019

Stoichiometry

Q. Calcium carbide (CaC2) reacts with water to produce acetylene (C2H2): CaC2 (s) + 2 H2O (g) → Ca(OH)2 (s) + C2H2 (g)Production of 13 g of C2H2 requi...

Solved • Sep 13, 2019

Stoichiometry

Q. Given the following reaction:2H2O2 → 2H2O + O2How many moles of H2O will be produced from 42.0 g of H 2O2?_____ moles (round to three significant f...

Solved • Aug 25, 2019

Stoichiometry

Q. Balance the equation and solve the following questions.CH3CH3 + O2 → CO2 + H2Oa) How many moles of CH3CH3 are in 13.50g of CH3CH3b) If 13.50g of CH...

Solved • Aug 6, 2019

Stoichiometry

Q. How many grams of Li3N can be formed from 1.75 moles of Li? Assume an excess of nitrogen.6 Li(s) + N2(g) → 2 Li3N(s)a. 18.3 g Li3Nb. 58.3 g Li3Nc. ...

Solved • Aug 2, 2019

Stoichiometry

Q. When hydrochloric acid reacts with barium hydroxide, barium chloride and water are produced. The balanced equation for this reaction is: 2HCl (aq) ...

Solved • Jul 9, 2019

Stoichiometry

Q. Sodium reacts with oxygen to form sodium oxide and has the following balanced chemical equation: 4 Na + O2 → 2 Na 2O.How many mole(s) of oxygen gas...

Solved • Jul 9, 2019

Stoichiometry

Q. Potassium superoxide, KO2, is often used in oxygen masks (such as those used by firefighters) because KO2 reacts with CO2 to release molecular oxyg...

Solved • Nov 12, 2018

Stoichiometry

Q. Potassium superoxide, KO2, is often used in oxygen masks (such as those used by firefighters) because KO2 reacts with CO2 to release molecular oxyg...

Solved • Nov 12, 2018

Stoichiometry

Q. The world burns the fossil fuel equivalent of 6x1012 kg of petroleum per year. Assume that all of this petroleum is in the form of octane (C8H18). ...

Solved • Nov 12, 2018

Stoichiometry

Q. How many moles of hydrogen gas would be produced for every mole of magnesium added into the HCl solution?Reaction of magnesium metal with hydrochlo...

Solved • Oct 31, 2018

Stoichiometry

Q. Nitrogen (N2) and hydrogen (H2) react to form ammonia (NH3). Consider the mixture of N2 and H2 shown in the accompanying diagram. The blue spheres ...

Solved • Oct 31, 2018

Stoichiometry

Q. You may want to reference (Pages 102 - 105)Section 3.6 while completing this problem.Sodium hydroxide reacts with carbon dioxide to form sodium car...

Solved • Oct 31, 2018

Stoichiometry

Q. Propane, C3H8, is a common fuel used for cooking and home heating. What mass of O2 is consumed in the combustion of 1.00 g of propane?

Solved • Oct 31, 2018

Stoichiometry

Q. Hard water contains Ca2+, Mg2+, and Fe2+, which interfere with the action of soap and leave an insoluble coating on the insides of containers and p...

Solved • Oct 31, 2018

Stoichiometry

Q. The diagram  represents a high-temperature reaction between CH4 and H2O.Based on this reaction, find how many moles of CO can be obtained starting ...

Solved • Oct 31, 2018

Stoichiometry

Q. The diagram represents a high-temperature reaction between CH4 and H2O.Based on this reaction, how many moles of H2 can be obtained starting with 6...

Solved • Oct 31, 2018

Stoichiometry

Q. A sample of an ionic compound containing iron and chlorine is analyzed and found to have a molar mass of 126.8 g/mol. What is the charge of the iro...

Solved • Oct 31, 2018

Stoichiometry

Q. Hydrogen cyanide, HCN, is a poisonous gas. The lethal dose is approximately 310 mg HCN per kilogram of air when inhaled.If the HCN is formed by rea...

Solved • Oct 31, 2018

Stoichiometry

Q. The source of oxygen that drives the internal combustion engine in an automobile is air. Air is a mixture of gases, which are principally N2 (~79%)...

Solved • Oct 31, 2018

Stoichiometry

Q. A mixture containing KClO3, K2CO3, KHCO3, and KCl was heated, producing CO2,O2, and H2O gases according to the following equations:2KClO3 (s) →2KCl...

Solved • Oct 31, 2018

Stoichiometry

Q. A mixture containing KClO3, K2CO3, KHCO3, and KCl was heated, producing CO2,O2, and H2O gases according to the following equations:2KClO3 (s) → 2KC...

Solved • Oct 31, 2018