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Stoichiometry Solutions Library

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461 solutions

Stoichiometry

Q. Coal power plants burn large amounts of coal, C(s), in an O2(g) atmosphere to generate electricity. The chemical reaction responsible for producing...

Solved • Oct 22, 2018

Stoichiometry

Q. What mass of Ca(OH)2 will react with 25.0 g of butanoic to form the preservative calcium butanoate according to the equation?

Solved • Oct 19, 2018

Stoichiometry

Q. A sample of gallium bromide, GaBr3, weighing 0.165 g was dissolved in water and treated with silver nitrate, AgNO3, resulting in the precipitation ...

Solved • Oct 19, 2018

Stoichiometry

Q. The toxic pigment called white lead, Pb3(OH)2(CO3)2, has been replaced in white paints by rutile, TiO2. How much rutile (g) can be prepared from 37...

Solved • Oct 19, 2018

Stoichiometry

Q. A compact car gets 37.5 miles per gallon on the highway. If gasoline contains 84.2% carbon by mass and has a density of 0.8205 g/mL, determine the ...

Solved • Oct 18, 2018

Stoichiometry

Q. In an accident, a solution containing 2.5 kg of nitric acid was spilled. Two kilograms of Na2CO3 was quickly spread on the area and CO2 was release...

Solved • Oct 18, 2018

Stoichiometry

Q. Urea, CO(NH2)2, is manufactured on a large scale for use in producing urea-formaldehyde plastics and as a fertilizer. What is the maximum mass of u...

Solved • Oct 18, 2018

Stoichiometry

Q. Automotive air bags inflate when a sample of sodium azide, NaN3, is very rapidly decomposed.2NaN3(s) ⟶ 2Na(s) + 3N2(g)What mass of sodium azide is ...

Solved • Oct 18, 2018

Stoichiometry

Q. Carborundum is silicon carbide, SiC, a very hard material used as an abrasive on sandpaper and in other applications. It is prepared by the reactio...

Solved • Oct 18, 2018

Stoichiometry

Q. What mass of silver oxide, Ag 2O, is required to produce 25.0 g of silver sulfadiazine, AgC10H9N4SO2, from the reaction of silver oxide and sulfadi...

Solved • Oct 18, 2018

Stoichiometry

Q. Silver is often extracted from ores such as K[Ag(CN)2] and then recovered by the reaction 2K[Ag(CN)2](aq) + Zn(s) ⟶ 2Ag(s) + Zn(CN)2(aq) + 2KCN(aq)...

Solved • Oct 18, 2018

Stoichiometry

Q. I2 is produced by the reaction of 0.4235 mol of CuCl2 according to the following equation: 2CuCl2 + 4KI ⟶ 2CuI + 4KCl + I 2.(b) What mass of  I2 is...

Solved • Oct 18, 2018

Stoichiometry

Q. I2 is produced by the reaction of 0.4235 mol of CuCl2 according to the following equation: 2CuCl2 + 4KI ⟶ 2CuI + 4KCl + I 2.(a) How many molecules ...

Solved • Oct 18, 2018

Stoichiometry

Q. Determine the number of moles and the mass requested for each reaction in each of the following:(c) The number of moles and the mass of sodium nitr...

Solved • Oct 18, 2018

Stoichiometry

Q. The zinc in a 1.343-g sample of a foot powder was precipitated as ZnNH  4PO4. Strong heating of the precipitate yielded 0.4089 g Zn2P2O7. Calculate...

Solved • Oct 17, 2018

Stoichiometry

Q. Chlorisondamine chloride (C14H20Cl6N2) is a drug used in the treatment of hypertension. A 1.28-g sample of a medication containing the drug was tre...

Solved • Oct 17, 2018

Stoichiometry

Q. Consider the following unbalanced chemical equation for the combustion of pentane (C5H12):C5H12 (l) + O2 (g) → CO2 (g) + H2O (l)If 20.4 g of pentan...

Solved • Oct 17, 2018

Stoichiometry

Q. You have seven closed containers, each with equal masses of chlorine gas (Cl 2). You add 10.0 g of sodium to the first sample, 20.0 g of sodium to ...

Solved • Oct 17, 2018

Stoichiometry

Q. Commercial brass, an alloy of Zn and Cu, reacts with hydrochloric acid as follows:Zn (s) + 2 HCl (aq) → ZnCl 2 (aq) + H2 (g) (Cu does not react wit...

Solved • Oct 17, 2018

Stoichiometry

Q. A 0.755-g sample of hydrated copper(II) sulfateCuSO4 • x H2Owas heated carefully until it had changed completely to anhydrous copper(II) sulfate (C...

Solved • Oct 17, 2018

Stoichiometry

Q. Aspirin (C9H8O4) is synthesized by reacting salicylic acid (C7H6O3) with acetic anhydride (C4H6O3). The balanced equation isC7H6O3 + C4H6O3 → C9H8O...

Solved • Oct 17, 2018

Stoichiometry

Q. Elixirs such as Alka-Seltzer use the reaction of sodium bicarbonate with citric acid in aqueous solution to produce a fizz:3 NaHCO3 (aq) + C6H8O7 (...

Solved • Oct 17, 2018

Stoichiometry

Q. The reusable booster rockets of the U.S. space shuttle employ a mixture of aluminum and ammonium perchlorate for fuel. A possible equation for this...

Solved • Oct 17, 2018

Stoichiometry

Q. There are two binary compounds of mercury and oxygen. Heating either of them results in the decomposition of the compound, with oxygen gas escaping...

Solved • Oct 16, 2018

Stoichiometry

Q. Fluorine is so reactive that it form compound with several of the noble gases.(c) Fluorides of xenon can be formed by direct reaction of the elemen...

Solved • Oct 16, 2018

Stoichiometry

Q. One of the compound used to increase the octane rating of gasoline is toluene (ball-and-stick model is shown). Suppose 20.0 mL of toluene (d = 0.86...

Solved • Oct 15, 2018

Stoichiometry

Q. The multistep smelting of ferric oxide to form elemental iron occurs at high temperatures in a blast furnace. In the first step, ferric oxide react...

Solved • Oct 15, 2018

Stoichiometry

Q. Gaseous dichlorine monoxide decomposes readily to chlorine (green) and oxygen (red) gases.(c) If each oxygen atom represents 0.050 mol, how many mo...

Solved • Oct 15, 2018

Stoichiometry

Q. Metal hydrides react with water to form hydrogen gas and the metal hydroxide. For example, SrH2(s) + 2H2O(l) ⟶Sr(OH)2(s) + 2H2(g)You wish to calcul...

Solved • Oct 15, 2018

Stoichiometry

Q. Methanol, CH3OH, is produced from the reaction of carbon monoxide and hydrogen: CO(g) + 2H2(g) ⟶CH3OH(l)How many moles of methanol can be produced ...

Solved • Oct 15, 2018

Stoichiometry

Q. Lead can be prepared from galena [lead(II) sulfide] by first roasting the galena in oxygen gas to form lead(II) oxide and sulfur dioxide. Heating t...

Solved • Oct 15, 2018

Stoichiometry

Q. Solid iodine trichloride is prepared in two steps: first, a reaction between solid iodine and gaseous chlorine to form solid iodine monochloride; s...

Solved • Oct 15, 2018

Stoichiometry

Q. Elemental sulfur occurs as octatomic molecules, S8. What mass (g) of fluorine gas is needed to react completely with 17.8 g of sulfur to form sulfu...

Solved • Oct 15, 2018

Stoichiometry

Q. Elemental phosphorus occurs as tetratomic molecules, P4. What mass (g) of chlorine gas is needed to react completely with 455 g of phosphorus to fo...

Solved • Oct 15, 2018

Stoichiometry

Q. Calculate the mass (g) of each product formed when 174 g of silver sulfide reacts with excess hydrochloric acid: Ag2S(s) + HCl(aq) ⟶AgCl(s) + H2S(g...

Solved • Oct 15, 2018

Stoichiometry

Q. Calculate the mass (g) of each product formed when 43.82 g of diborane (B 2H6) reacts with excess water: B2H6(g) + H2O(l) ⟶H3BO3(s) + H2(g) [unbala...

Solved • Oct 15, 2018

Stoichiometry

Q. Chromium(III) oxide reacts with hydrogen sulfide (H2S) gas to form chromium(III) sulfide and water: Cr2O3(s) + 3H2S(g) ⟶Cr2S3(s) + 3H2O(l) To produ...

Solved • Oct 15, 2018

Stoichiometry

Q. Chromium(III) oxide reacts with hydrogen sulfide (H2S) gas to form chromium(III) sulfide and water: Cr2O3(s) + 3H2S(g) ⟶Cr2S3(s) + 3H2O(l) To produ...

Solved • Oct 15, 2018

Stoichiometry

Q. Potassium nitrate decomposes on heating, producing potassium oxide and gaseous nitrogen and oxygen: 4KNO3(s) ⟶2K2O(s) + 2N2(g) + 5O2(g) To produce ...

Solved • Oct 15, 2018

Stoichiometry

Q. Bismuth oxide reacts with carbon to form bismuth metal: Bi 2O3(s) + 3C(s) ⟶2Bi(s) + 3CO(g) When 0.607 mol of Bi2O3 reacts with excess carbon, how m...

Solved • Oct 15, 2018

Stoichiometry

Q. In a car engine, gasoline (represented by C8H18) does not burn completely, and some CO, a toxic pollutant, forms along with CO2 and H2O. If 5.0% of...

Solved • Oct 15, 2018

Stoichiometry

Q. Sodium peroxide (Na2O2) is often used in self-contained breathing devices, such as those used in fire emergencies, because it reacts with exhaled C...

Solved • Oct 15, 2018

Stoichiometry

Q. The flask represents the products of the titration of 25 mL of sulfuric acid with 25 mL of sodium hydroxide.If each orange sphere represents 0.010 ...

Solved • Oct 15, 2018

Stoichiometry

Q. Before arc welding was developed, a displacement reaction involving aluminum and iron(III) oxide was commonly used to produce molten iron. Called t...

Solved • Oct 15, 2018

Stoichiometry

Q. An ionic compound forms when calcium (Z = 20) reacts with iodine (Z = 53). If a sample of the compound contains 7.4×1021 calcium ions, how many iod...

Solved • Oct 12, 2018

Stoichiometry

Q. An ionic compound forms when lithium (Z = 3) reacts with oxygen (Z = 8). If a sample of the compound contains 8.4×1021 lithium ions, how many oxide...

Solved • Oct 12, 2018

Stoichiometry

Q. CH4 and O2 react to form CO2 and H2O. Determine the amount of O2 needed to react with 9.25 g of CH4 to produce 25.44 g of CO2 and 20.83 g of H2O.

Solved • Oct 8, 2018

Stoichiometry

Q. Portland cement is a mixture of the oxides of calcium, aluminum, and silicon. The raw material for its calcium oxide is calcium carbonate, which oc...

Solved • Oct 8, 2018

Stoichiometry

Q. The thermite reaction is one of the most spectacular reactions with fames, sparks and glowing molten iron. Here aluminum reacts with iron (III) oxi...

Solved • Oct 8, 2018

Stoichiometry

Q. Balance the equation below and determine the mass in grams of N2 needed to produce 11.35g of NH3. H2 + N2 → ____NH3

Solved • Oct 8, 2018

Stoichiometry

Q. According to the following reaction, how many moles of carbon dioxide will be formed upon the complete reaction of 25.1 grams of propane (C3H8) wit...

Solved • Oct 8, 2018

Stoichiometry

Q. Consider the balanced equation: 2A + 5B <—> 3C + D (A) 8 mol A are mixed with 18 mol B at an elevated temperature. After 6 mol of A have reac...

Solved • Oct 8, 2018

Stoichiometry

Q. The reaction for producing glucose in plants, called photosynthesis, is 6CO2 + H2O → C6H12O6 + 6O2If a plant produces 9.36 mol of  C6H12O6, how man...

Solved • Oct 5, 2018

Stoichiometry

Q. According to the following reaction, how many grams of hydrobromic acid are necessary to form 0.424 moles bromine? hydrobromic acid (aq) → hydrogen...

Solved • Oct 5, 2018

Stoichiometry

Q. According to the following reaction, how many grams of water are necessary to form 0.650 moles hydrofluoric acid? silicon tetrafluoride (s) + water...

Solved • Oct 5, 2018

Stoichiometry

Q. According to the following reaction, how many grams of oxygen gas are required for the complete reaction of 23.5 grams of hydrochloric acid? hydroc...

Solved • Oct 5, 2018

Stoichiometry

Q. Be sure to answer all parts. One of the compounds used to increase the octane rating of gasoline is toluene (pictured). Suppose 35.8 mL of toluene ...

Solved • Oct 4, 2018

Stoichiometry

Q. Be sure to answer all parts. Calculate the mass of each product formed when 127 g of silver sulfide reacts with excess hydrochloric acid: Ag2S (s) ...

Solved • Oct 4, 2018

Stoichiometry

Q. Hydrocarbon mixtures are used as fuels. How many grams of CO2(g) are produced by the combustion of 499 g of a mixture that is 25.6% CH4, and 74.4% ...

Solved • Oct 4, 2018

Stoichiometry

Q. Be sure to answer all parts.Iron reacts slowly with oxygen and water to form a compound commonly called rust (Fe2O3•4H3O). For 53.1 kg of rust, cal...

Solved • Oct 4, 2018

Stoichiometry

Q. An automobile gasoline tank holds 22 kg of gasoline. When the gasoline burns, 86 kg of oxygen is consumed, and carbon dioxide and water are produce...

Solved • Oct 3, 2018

Stoichiometry

Q. According to the following reaction, how many grams of mercury(II) oxide are necessary to form 0.339 moles oxygen gas? mercury(II) oxide (s) → merc...

Solved • Sep 28, 2018

Stoichiometry

Q. According to the following reaction, how many grams of chlorine gas are necessary to form 0.837 moles iron(HI) chloride? iron (s) + chlorine (g) → ...

Solved • Sep 28, 2018

Stoichiometry

Q. Be sure to answer all parts. Calculate the mass of each product formed when 506 g of silver sulfide reacts with excess hydrochlorie acid: Ag2S (s) ...

Solved • Sep 28, 2018

Stoichiometry

Q. How many molecules (not moles) of NH3 are produced from 4.95 x 10-4 g of H2? Express your answer numerically as the number of molecules.

Solved • Sep 27, 2018

Stoichiometry

Q. A 1.560 - g sample of the alcohol CH3CHOHCH2CH3 is burned in an excess of oxygen. Part AWhat mass of CO2 should be obtained? Express your answer us...

Solved • Sep 27, 2018

Stoichiometry

Q. A sample of a substance with the empirical formula XBr2 weighs 0.5675 g. When it is dissolved in water and all its bromine is converted to insolubl...

Solved • Sep 27, 2018

Stoichiometry

Q. What mass of the second-listed reactant in each of the following reactions is needed to react completely with 2.014 g of the first-listed reactant?...

Solved • Sep 26, 2018

Stoichiometry

Q. According to the following reaction, how many grams of dichloromethane (CH2Cl2) will be formed upon the complete reaction of 29.4 grams of carbon t...

Solved • Sep 26, 2018

Stoichiometry

Q. According to the following reaction, how many moles of nitrogen gas will be formed upon the complete reaction of 29.4 grams of ammonium nitrite?amm...

Solved • Sep 26, 2018

Stoichiometry

Q. According to the following reaction, how many moles of nitrogen gas will be formed upon the complete reaction of 0.741 moles ammonium nitrite? ammo...

Solved • Sep 26, 2018

Stoichiometry

Q. In the combustion of hydrogen gas, hydrogen reacts with oxygen from the air to form water vapor. hydrogen + oxygen → water If you bun 27.8 g of hyd...

Solved • Sep 26, 2018

Stoichiometry

Q. Use balanced chemical equations to relate amounts of reactants and products. The unbalanced equation for the reaction between carbon dioxide and po...

Solved • Sep 26, 2018

Stoichiometry

Q. Use reaction stoichiometry to calculate amounts of reactants and products. The substances magnesium nitride and water react to form magnesium hydro...

Solved • Sep 26, 2018

Stoichiometry

Q. Be sure to answer all parts.Aspirin or acetyl salicylic acid is synthesized by reacting salicylic acid with acetic anhydride:C7H6O3          + C4H6...

Solved • Sep 26, 2018

Stoichiometry

Q. Nitrogen monoxide is produced by combustion in an automobile engine. According to the following reaction, how many grams of nitrogen dioxide will b...

Solved • Sep 24, 2018

Stoichiometry

Q. Nitrogen monoxide is produced by combustion in an automobile engine. According to the following r reaction, how many moles of nitrogen dioxide will...

Solved • Sep 24, 2018

Stoichiometry

Q. According to the following reaction, how many grams of iodine are necessary to form 0.544 moles hydrogen iodide? hydrogen (g) + iodine (s) → hydrog...

Solved • Sep 24, 2018

Stoichiometry

Q. When heated, KClO3 decomposes into KCl and O2. 2KClO3 → 2KCl + 3O2 If this reaction produced 70.4 g of KCl, how much O2 was produced (in grams)?

Solved • Sep 24, 2018

Stoichiometry

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

Solved • Sep 24, 2018

Stoichiometry

Q. When heated, KCIO3 decomposes into KCI and O2. 2KCIO3 → 2KCI + 3O2 If this reaction produced 60.3 g of KCI, how much O2 was produced (in grams)?

Solved • Sep 19, 2018

Stoichiometry

Q. How many molecules (not moles) of NH3 are produced from 6.33 x 10-4 g of H2? Express your answer numerically as the number of molecules.

Solved • Sep 19, 2018

Stoichiometry

Q. Part 1Use the following balanced equation: 2H2 + O2 → 2H2O If you start with 24 molecules of hydrogen gas, how marry molecules of oxygen gas do you...

Solved • Sep 19, 2018

Stoichiometry

Q. Consider the following unbalanced equation: MnO2 (s) + Al (s) →Mn (s) + Al2O3 (s) How many grams of Al are required to completely react with 56.2 g...

Solved • Sep 19, 2018

Stoichiometry

Q. Consider the following imbalanced equation: MnO2 (s) + Al (s) →How many grams of Al are required to completely react with 56.2 g of MnO2? How many ...

Solved • Sep 18, 2018

Stoichiometry

Q. How much NaNO3 is formed in the reaction of 220 grams of sodium chloride with excess lead nitrate in the reaction shown below? 2Nacl + Pb(NO3)2 → 2...

Solved • Sep 7, 2018

Stoichiometry

Q. According to the following reaction, how many grams of water are necessary to form 0.417 moles zinc hydroxide?zinc oxide (s) + water (l) → zinc hyd...

Solved • Sep 7, 2018

Stoichiometry

Q. According to the following reaction, how many grams of water are needed to form 25.4 grams of oxygen gas? water (l) → hydrogen (g) + oxygen (g) 

Solved • Sep 7, 2018

Stoichiometry

Q. Consider the reaction: 2CO (g) + O2 (g) → 2CO2 (g) Given an initial mass of 17.48 g CO, an excess of O2, and assuming that all of the reactant is c...

Solved • Sep 6, 2018

Stoichiometry

Q. For the reaction, calculate how many moles of the product form when 0.021 mol of O2 completely reacts. Assume that there is more than enough of the...

Solved • Sep 6, 2018

Stoichiometry

Q. According to the following reaction, bow many grains of phosphoric acid will be formed upon the complete reaction of 27.3 grams of tetraphosphorus ...

Solved • Aug 29, 2018

Stoichiometry

Q. For the following redox reaction, balance the chemical equation, and determine the number of grams of MgO that are needed to produce 3.33 g of Fe2O...

Solved • Aug 29, 2018

Stoichiometry

Q. 2.0 g of hydrogen reacts with enough nitrogen to make 11.4 g of ammonia, how much nitrogen was used in this reaction? (i) 13.4 g (ii) 9.4 g (iii) 1...

Solved • Aug 29, 2018

Stoichiometry

Q. Iron reacts with 48.0 g of oxygen to make 159.6 g of rust (Fe2O3); how much iron reacted? (a) 111.6 g (b) 48.0 g (c) 207.6 g (d) 55.8 g

Solved • Aug 29, 2018

Stoichiometry

Q. Ammonia (NH3) chemically reacts with oxygen gas (O2) to produce nitric oxide (NO) and water (H2O). What mass of oxygen gas is consumed by the react...

Solved • Aug 28, 2018

Stoichiometry

Q. Part BWhat is the maximum amount in moles of P2O5 that can theoretically be made from 272 g of O2 and excess phosphorus? Express your answer to thr...

Solved • Aug 28, 2018

Stoichiometry

Q. When heated, KCIO3 decomposes into KCI and O2. 2KCIO3 → 2KCI + 3O2 If this reaction produced 33.4 g of KCI, how much O2 was produced (in grams)?

Solved • Aug 27, 2018

Stoichiometry

Q. 2 NH4NO3 → N2 + O2 + 4 H2OPart BDetermine how much oxygen in grams is produced by the complete reaction of 3.27 kg of ammonium nitrate.

Solved • Aug 27, 2018

Stoichiometry

Q. What is the maximum amount in moles of P2O5 that can theoretically be made from 240 g of O2 and excess phosphorus?

Solved • Aug 26, 2018

Stoichiometry

Q. For the balanced reaction 4NH3 + 3O2 → 2N2 + 6H2O (Atomic weights: H = 1.0 g/mol: N = 14.0 g/mol: O = 16.0 g/mol), the mass of oxygen needed to rea...

Solved • Aug 22, 2018