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Stoichiometry Solutions Library

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461 solutions

Stoichiometry

Q. a. How many moles of NH3 can be produced from 16.5 mol of H 2 and excess N2?b. How many grams of NH3 can be produced from 3.78 mol of N 2 and exces...

Solved • Mar 7, 2018

Stoichiometry

Q. 3H2(g) + N2(g) → 2NH3(g)How many moles of NH3 can be produced from 24.0 mol of H 2 and excess N2?

Solved • Feb 19, 2018

Stoichiometry

Q. Balance the following chemical equation:CH4 + O2 → CO2 + H2OGiven 10.0 g of CH4 and unlimited supply of O2, determine the mass (grams) of H 2O that...

Solved • Feb 15, 2018

Stoichiometry

Q. Consider the following balanced equation for the neutralization of acetic acid.2HC2H3O2(aq) + Ca(OH)2(aq) → 2H2O(l) + Ca(C2H3O2)2(aq)Determine how ...

Solved • Feb 14, 2018

Stoichiometry

Q. a) What is the molar mass of butane, C 4H10 ?  b) Calculate the mass of water produced when 8.80 g of butane reacts with excess oxygen.  c) Calcula...

Solved • Feb 14, 2018

Stoichiometry

Q. The compound P4S3 is used in matches. It reacts with oxygen to produce P4O10 and SO2. The unbalanced equation is shown below.P4S3(s) + O2(g) → P4O1...

Solved • Dec 15, 2017

Stoichiometry

Q. Hydrogen gas, H2, reacts with nitrogen gas, N2, to form ammonia gas, NH 3, according to the equation3H2 (g) + N2 (g) → 2NH3 (g)How many molecules (...

Solved • Dec 15, 2017

Stoichiometry

Q. Aluminum reacts with oxygen gas to produce aluminum oxide, Al 2O3. Determine the mass, in grams, of aluminum needed to produce 6.58 g of aluminum o...

Solved • Nov 10, 2017

Stoichiometry

Q. Consider the reaction of Na 2CO3 with excess of Ca(OH)2. How many formula units of NaOH will be obtained by reacting 10.5 g of Na2CO3?

Solved • Oct 10, 2017

Stoichiometry

Q. When glucose, C6H12O6, reacts with oxygen it produces carbon dioxide and water. What mass of oxygen (in grams) is required for complete reaction of...

Solved • Oct 10, 2017

Stoichiometry

Q. Plants incorporate CO2 from the atmosphere into biologically available carbon during photosynthesis:CO2 + H2O → C6H12O6 + O2 Balance the equation f...

Solved • Oct 10, 2017

Stoichiometry

Q. How many grams of sulfur are required to react with 1.50 moles of copper in the process?2Cu + S → Cu2S 

Solved • Oct 10, 2017

Stoichiometry

Q. How many molecules of carbon dioxide will be formed if 4.89 g of propane, C 3H8, is burned with excess oxygen?a. 8.83 × 1024 moleculesb. 6.68 × 102...

Solved • Jul 26, 2017

Stoichiometry

Q. Lead(II) sulfide (PbS) was once used in glazing earthenware. It will also react with hydrogen peroxide (H2O2) to form lead(II) sulfate and water. H...

Solved • Jul 13, 2017

Stoichiometry

Q. Barium hydroxide (used in corrosion inhibitors and lubricants) reacts with chloric acid (HClO3) to form barium chlorate [Ba(ClO3)2] and water. What...

Solved • Jul 13, 2017

Stoichiometry

Q. How many moles of H3PO4 are produced when 36.5 g of HCl are produced by the reaction PCl5 + H2O → H3PO4 + HCl?(A) 0.2 mol H3PO4(B) 0.5 mol H3PO4(C)...

Solved • Jul 13, 2017

Stoichiometry

Q. Iron metal reacts with bromine as follows: Fe(s) + Br2(g) → FeBr3(s)How many moles of FeBr3 are obtained when 4.6 mol of Br2 reacts with excess Fe?...

Solved • Jul 13, 2017

Stoichiometry

Q. Consider the reaction of hydrogen gas (H2) and oxygen gas (O2) to form water. How many molecules of water will be made by the reaction of 12.0 g of...

Solved • Jul 13, 2017

Stoichiometry

Q. How many moles of NH 3 are needed to react completely with 30.0 mol of F 2? 2 NH3 + 5 F2 → N2F4 + 6 HF (A) 2 mol (B) 12 mol (C) 5 mol (D) 30 m...

Solved • Jul 12, 2017

Stoichiometry

Q. If 3.25 g of butane (C4H10, M = 58.14) is burned (combusted) in the presence of excess O2, what is the mass of CO2 that forms, in g?Enter your answ...

Solved • Jun 20, 2017

Stoichiometry

Q. Aluminum reacts with hydrochloric acid to produce aluminum chloride and hydrogen gas.        2 Al(s) + 6 HCl(aq) → 2 AlCl3(aq) + 3 H2(g)What mass o...

Solved • May 24, 2017

Stoichiometry

Q. Potassium reacts with chlorine gas to produce potassium chloride. How many moles of K will react with 0.40 moles of Cl2? a. 0.20 mol b. 0.32 mol ...

Solved • May 24, 2017

Stoichiometry

Q. How many moles of Ca(OH)2 are needed to neutralize three moles of HCl?21.513

Solved • Apr 19, 2017

Stoichiometry

Q. A 5.00 g sample of a gas mixture, consisting of methane, CH4, and ethylene, C2H4, was burned in excess oxygen, yielding 14.5 g of CO2 and some amou...

Solved • Mar 16, 2017

Stoichiometry

Q. Calcium metal reacts with water to form calcium hydroxide and hydrogen gas. How much hydrogen is formed when 0.50 g of calcium are added to water? ...

Solved • Jan 13, 2017

Stoichiometry

Q. Aqueous solutions of sodium hypochlorite (NaOCl), also known as household bleach, are prepared by reaction of sodium hydroxide with chlorine:     ...

Solved • Oct 7, 2016

Stoichiometry

Q. Use this chart when given a chemical equation with the  KNOWN quantity of a compound or element and asked to find the UNKNOWN quantity of another c...

Solved • Sep 22, 2016

Stoichiometry

Q. Consider the following balanced reaction. What mass (in g) of CO 2 can be formed from 288 mg of O2? Assume that there is excess C3H7SH present. C3H...

Solved • Sep 14, 2016

Stoichiometry

Q. How many molecules of HCl are formed when 50.0 g of water reacts according to the following balanced reaction? Assume excess ICl3. 2 ICl3 + 3 H2O ...

Solved • Sep 14, 2016

Stoichiometry

Q. How many molecules of HCl are formed when 50.0 g of water reacts according to the following balanced reaction? Assume excess ICl3. 2 ICl3 + 3 H2O →...

Solved • Sep 14, 2016

Stoichiometry

Q. How many grams of oxygen are formed when 6.21 moles of KOH are formed?  4 KO (s) + 2 H2O (l) → 4 KOH (s) + O2 (g) A) 11.7 g O2 B) 27.9 g O2 C) ...

Solved • Sep 14, 2016

Stoichiometry

Q. Phosphine, an extremely poisonous and highly reactive gas, will react with oxygen to form tetraphosphorus decaoxide and water. PH3(g) + O2(g) → P4O...

Solved • Sep 13, 2016

Stoichiometry

Q. Hydrogen peroxide (H2O2) decomposes into water and oxygen gas. How many moles of oxygen gas are formed from the decomposition of 3 moles of hydroge...

Solved • Sep 9, 2016

Stoichiometry

Q. How many grams of nitrogen gas are formed when 58.6 g of KNO  3 decomposes according to the following reaction? (Molar masses: KNO3 = 101.11 g/mol,...

Solved • Sep 8, 2016

Stoichiometry

Q. In the chemical reaction N2 + 3 Mg → Mg 3N2 if you begin with 1.35 moles of Mg, how many moles of N2 are required to react all of the Mg?A. 0.45   ...

Solved • Aug 8, 2016

Stoichiometry

Q. Consider the process of 2 H(g) → H2(g) where ΔH = −436 kJ/mol Determine if the sentence below is true or false. Reacting two moles of H(g) would ...

Solved • Aug 8, 2016

Stoichiometry

Q. A mixture contains only NaCl and Fe(NO 3)3. A 0.456-g sample of the mixture is dissolved in water, and an excess of NaOH is added, producing a prec...

Solved • Jul 21, 2016

Stoichiometry

Q. A mixture contains only NaCl and Fe(NO 3)3. A 0.456-g sample of the mixture is dissolved in water, and an excess of NaOH is added, producing a prec...

Solved • Jul 21, 2016

Stoichiometry

Q. A 1.00-g sample of an alkaline earth metal chloride is treated with excess silver nitrate. All of the chloride is recovered as 1.38 g of silver chl...

Solved • Jul 21, 2016

Stoichiometry

Q. A 1.42-g sample of a pure compound, with formula M2SO4, was dissolved in water and treated with an excess of aqueous calcium chloride, resulting in...

Solved • Jul 21, 2016

Stoichiometry

Q. One of relatively few reactions that takes place directly between two solids at room temperature isBa(OH)2 • 8H2O(s) + NH4SCN(s) → Ba(SCN)2(s) + H2...

Solved • Jul 21, 2016

Stoichiometry

Q. The reaction between potassium chlorate and red phosphorus takes place when you strike a match on a matchbox. If you were to react 52.9 g of potass...

Solved • Jul 21, 2016

Stoichiometry

Q. Over the years, the thermite reaction has been used for welding railroad rails, in incendiary bombs, and to ignite solid-fuel rocket motors. The re...

Solved • Jul 21, 2016

Stoichiometry

Q. Photosynthesis occurs by the following chemical reaction. If a plant consumes 28.9 g of CO2 in one week, what mass of glucose (g) can the plant pro...

Solved • May 18, 2016

Stoichiometry

Q. How many moles of iron react with 1.75 mol of oxygen gas? The equation  for the reaction is: 3 O2 (g) + 4 Fe (s) → 2 Fe2O3 (s) a) 1.31 mol b) 1....

Solved • May 6, 2016

Stoichiometry

Q. A self-contained breathing apparatus uses potassium superoxide, KO2, to  convert the carbon dioxide and water in exhaled air into oxygen, as shown ...

Solved • May 6, 2016

Stoichiometry

Q. What is the maximum mass of aluminum chloride that could be obtained from 6.00 mol of barium chloride and excess aluminum sulfate? This is the bala...

Solved • May 6, 2016

Stoichiometry

Q. Copper(II) nitrate decomposes upon heating to form copper(II) oxide, nitrogen dioxide gas, and oxygen gas. If 1.0 mole of copper(II) nitrate decomp...

Solved • Mar 31, 2016

Stoichiometry

Q. Calculate the total number of grams of ammonia, NH 3, required to produce 566.0 g of Cu(NH3)4SO4 using the balanced reaction given below.CuSO4 + 4N...

Solved • Mar 11, 2016

Stoichiometry

Q. What mass of oxygen is needed for the complete combustion of 155 mL of C6H6 (molar mass = 78.1 g/mol) to produce carbon dioxide and water? Density ...

Solved • Feb 12, 2016

Stoichiometry

Q. What mass of H 2 is produced when 60.0 g of aluminum reacts with excess HCl?  Al(s)    +    HCl(aq)    →    AlCl 3(aq)    +    H 2(g) A. 6.73 g    ...

Solved • Feb 12, 2016

Stoichiometry

Q. Diborane, B2H6, can be prepared according to the following equation: 3 NaBH4 (aq) + 4 BF3 → 3 NaBF4 (aq) + 2 B2H 6 If 10.5 moles of NaBF4 are pro...

Solved • Feb 12, 2016

Stoichiometry

Q. Molecular hydrogen is used as the “liquid fuel” (liquefied hydrogen) for rockets. How much water is generated from 1000 gallons of liquefied hydrog...

Solved • Feb 12, 2016

Stoichiometry

Q. When 1 mole of glucose (C6H12O6) is completely burned into CO2, how many moles of H2O are produced? The unbalanced equation for this reaction is as...

Solved • Feb 12, 2016

Stoichiometry

Q. What is the minimum grams of air needed for the complete combustion of 8.00 g of heptane (C7H16)? Air is 21% O2 by mass.   a) 28 b) 5.9 c) 130 ...

Solved • Feb 5, 2016

Stoichiometry

Q. For the following acid-base reaction, calculate the mass (in grams) of the acid necessary to completely react with and neutralize 4.85 g of the bas...

Solved • Feb 5, 2016

Stoichiometry

Q. Sulfuric acid dissolves aluminum metal according to the reaction: 2 Al (s) + 3 H2SO4 (aq)      →       Al 2(SO4)3 (aq) + 3 H2 (g) Suppose you wan...

Solved • Feb 5, 2016

Stoichiometry

Q. Calculate the mass of hydrogen and the mass of oxygen required to make 250 L of water assuming the reaction goes to completion (i.e. 100% yield). T...

Solved • Feb 4, 2016

Stoichiometry

Q. Taxol is a remarkable new weapon in the war against cancer. Isolated from the bark of the Pacific Yew, it has been shown to be highly effective aga...

Solved • Feb 4, 2016

Stoichiometry

Q. How many grams of Ca(NO 3)2 can be produced by reacting excess HNO3 with 7.40 g of Ca(OH)2?a) 10.2 gb) 16.4 gc) 32.8 gd) 8.22 ge) 7.40 g

Solved • Feb 3, 2016

Stoichiometry

Q. A 1.000-g sample of a metal chloride, MCl 2, is dissolved in water and treated with excess aqueous silver nitrate. After drying, the silver chlorid...

Solved • Feb 3, 2016