The Earth’s ozone layer is under attack in part by chlorine released when ultraviolet radiation breaks apart certain fluorocarbons. Consider three fluorocarbons known as CFC-11 (CCl3F), CFC-12 (CCl2F2), and HCFC-22 (CHF2CL). (a) Calculate the percentage by weight of chlorine in each of these fluorocarbons. (b) If each kilogram of CFC-11 could be replaced by 1 kg of HCFC-22, by what percentage would the mass of chlorine emissions be reduced?

Q: 6. 1.50 X 1024 molecules of oxygen are burned in a combustion reaction. What is the mass of O2…

A: Moles of compound from given number of molecules can be calculated as: Number of mole=given number…

Q: Methane, CH4, burns in oxygen. a what are the products of the reaction? (Express your answers as…

A:

Q: Combustion of hydrocarbons such as nonane (C,H20) produces carbon dioxide, a "greenhouse gas."…

A: The balanced equation for the combustion of octane is   C9H20 (l)+ 14 O2 (g)------------> 9 CO2…

Q: Diiodine pentoxide is used in respirators to remove carbon monoxide from air. I2O5(s) + 5CO(g) →…

A: The balanced reaction taking place is given as, => I2O5 (s) + 5 CO (g) ------------> I2 (s) +…

Q: If the density of ethanol is 0.789 g/mL, how many cm3 can be produced by the fermentation of 45.4 kg…

A: Ethyl alcohol is formed by enzyme action on sugars and starches by fermentation. C6H12O6 → 2 CO2 + 2…

Q: The fuel tank of an automobile contains 62.0 kg of gasoline. If the gasoline reacts completely with…

A: Answer:- This question is answered by using the simple concept of stoichiometry which involves the…

Q: Aspirin can be prepared from salicylic acid (C7H6O3 ), which has a molar mass of 138.12 g/mol, and…

A:

Q: over 2 billion pounds per year. Acrylonitrile, the building block for polyacrylonitrile fibers and a…

A:

Q: Because of increasing evidence of damage to the ozone layer, chlorofluorocarbon (CFC) production was…

A: Given that each of the 100 million automobiles contains 1.1 Kg of CFC-12. So the total amount of…

Q: What is the percentage by mass of chlorine in the insecticide Lindane, C6H6Cl6?

A:

Q: Combustion of hydrocarbons such as pentane (C,H12) produces carbon dioxide, a "greenhouse gas."…

A:

Q: What mass of HCl in grams is neturalized by a dose of milk of magnesia containing 3.26g Mg(OH)2?

A: Given :- mass of Mg(OH)2 = 3.26 g  To calculate :- mass of HCl (in g)

Q: Emissions from the burning of fossil fuels are often reported as gigatons ( Gt ) of carbon. In a…

A: Given that : Amount of carbon emitted by China = 2.9 Gt Amount of carbon emitted by United States =…

Q: experiment was done to determine the composition of a mixture of sodium chloride and sodium…

A:

Q: The low-grade iron ore taconite, which contains Fe3O4, is concentrated and made into pellets for…

A: Given : Mass of ore used = 1 ton = 1 X 106 g                                                (since 1…

Q: (a) copper(II) nitrate (b) sulfur (c) honey (d) drinking water OUCOTIOU TI

A: Step 1) a) copper(II) nitrate : Cu(NO3)2 It is also known as cupric nitrate formula or copper…

Q: Octane, C8H18, can be used as a representative compound for gasoline. Calculate the mass of carbon…

A: Combustion of hydrocarbon is chemical change in which hydrocarbon reacts with oxygen gas to produce…

Q: If 8.9 x 1025 molecules of CO, are produced in a combustion reaction, what is the mass in kg of CO,…

A: Given:  Number of molecules of carbon dioxide =8.9 x 1025Mass of carbon dioxide produced has to be…

Q: Combustion of hydrocarbons such as propane (C3H₂) produces carbon dioxide, a "greenhouse gas."…

A: Combustion reaction; Combustion reaction is a reaction in which hydrocarbons react with Oxygen (O2)…

Q: If there were 4.00 x 10^23 sodium ions available, (and more than enough carbonate ions), how many…

A:

Q: Aspirin or acetyl salicylic acid is synthesized by reacting salicylic acid with acetic anhydride:…

A: Since the given reaction is C7H6O3 + C4H6O3 -----> C9H8O4 + C2H4O2  a) Hence from the above…

Q: A chemical plant uses electrical energy to decompose aqueoussolutions of NaCl to give Cl2, H2, and…

A: The given equation -  Calculate the number of moles of Cl2 - Now calculate the moles and mass for…

Q: For many years the recovery of gold—that is, the separation of gold from other materials—involved…

A: a.

Q: Combustion of hydrocarbons such as butane (C H10) produces carbon dioxide, a "greenhouse gas."…

A: Since the hydrocarbons are mainly composed of C and H-atoms, therefore, their complete combustion in…

Q: Combustion of hydrocarbons such as pentane (C,H2) produces carbon dioxide, a "greenhouse gas."…

A: Combustion :- The burning of a substance in excess of air or oxygen is defined as combustion The…

Q: Combustion of hydrocarbons such as methane (CH4) produces carbon dioxide, a "greenhouse gas."…

A: Write a balanced chemical equation, including physical state symbols, for the combustion of gaseous…

Q: The low-grade iron ore taconite, which contains Fe3O4, is concentrated and made into pellets for…

A: Given: Mass of taconite pellet = 1 ton Mass of iron = 545 lb To Calculate: percentage of the pellets…

Q: Hydrogen cyanide, HCN, is prepared from ammonia, air, and natural gas ( CH4) by the following…

A: The balance chemical reaction :  2NH3(g) + 3O2(g) + 2CH4(g) ---Pt---> 2HCN(g) + 6H2O(g)  Mass of…

Q: Commercial solvents are commonly sold in 55-gallon drums. What is the weight in pound of the carbon…

A: Volume of the solvent = 55 gallon Volume of solvent in cc = 208198 cm3 (since 1 gallon = 3785.41…

Q: Consider the following reaction for formation of nitric acid from the pollutant nitrogen dioxide…

A:

Q: 1.1 It is well-known that te emission of greenhouse gasses such as carbon dioxide presents a very…

A: SOLUTION: Step 1: Hello. Since the question contains multiple parts with sub-parts, the first…

Q: Nitroglycerin (C3H;N3O9) is a powerful explosive. Its decomposition may be represented by 4C3H3N309…

A: a)  Given,

Q: Combustion of hydrocarbons such as hexane (C₁4) produces carbon dioxide, a "greenhouse gas."…

A:

Q: A chemist needs 1.28 g of sodium hypochlorite, NaOCl(s), for an experiment, but she only has sodium…

A: The mass of a compound can be determined by the molar mass of compound and the respective molar mass…

Q: Combustion of hydrocarbons such as hexane (C6H₁4) produces carbon dioxide, a "greenhouse gas."…

A: 1) we need to write balanced equation for combustion of hexane

Q: traight-chain, saturated carboxylic acids, a class of hydrocarbons, has the general formula…

A: Given general formula is, CnH2n+1COOH And n=1  So, Molecular formula becomes CH3COOH We know ,…

Q: If the mass of crucible and lid = 21.17 g Mass of crucible and lid and salt = 23.02g Mass of…

A: Given: Mass of crucible and lid = 21.17g Mass of crucible and lid and salt = 24.23g Mass of crucible…

Q: The acid–base reaction between phosphoric acid, H3PO4, and calcium hydroxide, Ca(OH)2, yields water…

A: In the balance reaction, phosphoric acid, H3PO4, a weak acid, reacts calcium hydroxide, Ca(OH)2 to…

Q: Combustion of hydrocarbons such as nonane (C,H20) produces carbon dioxide, a "greenhouse gas."…

A: When a hydrocarbon reacts with oxygen then, it will form carbon dioxide and water and liberate huge…

Q: Combustion of hydrocarbons such as propane (C,Hg) produces carbon dioxide, a "greenhouse gas."…

A: You have given that combustion of propane gas takes place.  The balanced chemical reaction is given…

Q: Combustion of hydrocarbons such as octane (C3H13) produces carbon dioxide, a "greenhouse gas."…

A:

Q: Hydrogen cyanide, HCN, is prepared from ammonia, air, and natural gas (CH4) by the following…

A: Mass of NH3 = 4.90 g * Moles of NH3 = Mass of NH3 / molar mass of NH3 = 4.90 g / (17 g/mol) = 0.288…

Q: If the gasoline reacts completely with excess oxygen (from the air) to form CO2 and H2O, what is the…

A: Given :- mass of gasoline = 62.0 kg  To be calculated :-  Mass of CO2  Mass of H2O

Q: The approximate minimum daily dietary requirement of the amino acid leucine, C6H13NO2, is 1.1 g.…

A: Molar mass of the amino acid leucine ( C6H13NO2 ) = 12 x 6 + 1 x 13 + 14 x 1 + 16 x 2 = 72 + 13 + 14…

Q: 2NH3(aq) + CO, (aq) → CH,N,O(aq) + H,O(1) In an industrial synthesis of urea, a chemist combines…

A: In chemistry, there are many ways to check the deviation of experimental data from the accurate…

Q: Aspirin can be prepared from salicylic acid (C7H6O3 ), which has a molar mass of 138.12 g/mol, and…

A:

Q: Manufacturers of headache remedies routinely claim that their own brands are more potent pain…

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Q: You heat 2.53 grams of metallic mercury in air, which produces 2.73 grams of red-orange residue.…

A: The mass of oxygen that react with 2.53 g mercury is,

Q: C3H8 + 5O2    --> 3CO2 + 4H2O                                                         How many…

A: To calculate grams of oxygen required, we would use dimensional analysis method .  For this we would…

Q: Green plants use light from the Sun to drive photosynthesis. Photosynthesis is a chemical reaction…

A: The reaction involves reactants water and carbon dioxide to produce products glucose and oxygen.…

Mole Concept

Mole concept is a method to determine the amount of any substance that consists of some elemental particles using a grouping unit called ‘mole’. The mole concept enables one to handle the large amount of small elementary particles. The mole concept can be used in many calculations related to mole calculation, molar amount, mole ratio, and so on, which are significant in chemistry.