Ethylene dibromide was banned as a grain pesticide in 1983 because it was found to accumulate in groundwater. Laboratory tests showed EDB to be a carcinogen that causes reproductive disorders in test animals. Calculate (a) the empirical formula and (b) the molecular formula for ethylene dibromide given its approximate molar mass of 190 g/mol and its percent composition:12.7% C, 2.1% H, and 85.1% Br.

Q: A compound has an epirical formula of CH2O. If the molar mass of the compound is 60g/mol, what is…

A: emperical mass=12+2+16=30 n=60/2=2

Q: Narceine is a narcotic in opium that crystallizes from solution as a hydrate that contains 10.8 mass…

A: Given : Mass percentage of water = 10.8% Molar mass of nicotine = 499.52 g/mol

Q: For a compound containing 181.351 g C, 36.5115 g a) the empirical formula C2H4N C3H7N C3H6N3 b) the…

A:

Q: The rotten smell of a decaying animal carcass is partially due to a nitrogen-containing compound…

A: If the total amount of given substance is 100 g than 54.50 g of carbon, 13.73 g of H, and 31.77 g of…

Q: Calculate the molar mass (in grams/mol) of     a) osmium metal, the densest naturally occurring…

A: Molar mass of a substance is equal to the sum of masses of all its elements. Atomic mass of C is 12…

Q: 7. Using the laboratory data table below, calculate the number of water molecules (X) in a hydrate…

A: Given: Mass of clean, dry test tube is 18.42 g Mass of test tube and hydrated barium chloride is…

Q: how Many moles are they

A: Given :- mass of CO2 =1100 g  To calculate :- number of moles of CO2

Q: Calculate the molar mass for H2SO4, Ca(OH)2, a

A: Sum of the atomic masses of all the constituent atoms of a molecule gives molar mass  Atomic…

Q: Trichloroethylene (TCE) is a common solvent used to degrease machine parts. Calculate the empirical…

A: Empirical formula is the simplest representation of the elements present in the compound. Molecular…

Q: Ibuprofen, C13H18O2, is a covalent compound and the active ingredient in common…

A: Given  Mass of Ibuprofen = 100 gram  Number of mole    = ?

Q: Regular treatment with low dose aspirin is used to help prevent cardiovascular disease. How many…

A: Given : The molecular formula of aspirin = C9H8O4  And the mass of aspirin = 160 mg  Since 1 mg =…

Q: A compound of C and H burns in the presence of oxygen to produce 46.39 g CO2 and 18.99 g H2O. Given…

A: 18 gm H2O contains 2 gm H  18.99 gm H2O contains = (18.99*2)/18 = 2.11 gm H  44 gm CO2 contains 12…

Q: Cumene is a compound containing only carbon and hydrogen that is used in the production of acetone…

A:

Q: Chlorofluorocarbons (CFC's) are a class of compounds that have a long b of use in refrigerators…

A: Since you have posted multiple questions, we are entitled to answer the first only.

Q: Mass of empty beaker + watch glass: 154.00g Mass of beaker and hydrate (before heating): 155.58g…

A: Hydrated salts are those which contain water of hydration associated with it. When the water of…

Q: Caffeine, a molecule found in coffee, tea and certain soft drinks contains C, H, O and N. Combustion…

A: The reactions are given as,

Q: 5. Aspartame is an artificial sweetener that is 160 times sweeter than sucrose (table sugar) when…

A: Molecular formula is C14 H18 N2 O5  We need to find it's molar mass.  Amount of molecules in 10.0 g…

Q: Acetylene is used in oxyacetylene gas welding. Calculate the empirical formula for acetylene given…

A:

Q: reacting

A: Dear student I have given answer to your question in the image format.

Q: A student was given a sample of hydrated Na2CrO4 (molar mass of anhydrous Na2CrO4: 162.0 g/mol). She…

A:

Q: Sodium phosphate, Na3PO4, can be prepared by combining sodium hydroxide and hydrogen phosphate as…

A:

Q: The image shows the products of a combustion reaction of a hydrocarbon containing only carbon and…

A:

Q: . Lycopene (C40H56) is an antioxidant molecule that is thought to slow aging and reduce the risk of…

A: Given that Lycopene is C40H56 an antioxidant. Minimum daily intake = 6.5 mg = 0.0065 gram

Q: Xylene, an organic compound that is a major component of many gasoline blends, contains carbon and…

A: Xylene, an organic compound and contains carbon and hydrogen only. Mass of xylene sample=17.12 mg…

Q: A hydrated magnesium salt, MgSO4 • × H2O, was heated until all the water of hydration was lost. If a…

A: Number of moles is calculated by dividing the given mass with molecular mass.

Q: Complete the table below for calculating the molar mass of the ionic compound chromium(II) fluoride…

A: Given Chromium(II)fluoride is given, the mass of each ion in 1 mole of Chromium(II)fluoride is to be…

Q: One of the first chemical WMDs, researchers initially produced VX nerve agent for retail sale in the…

A: we need to determine the empirical formula of the nerve agent

Q: molecules

A:

Q: Aspirin, C9H8O4, is a common pain reliever and is also often given in low doses daily for prevention…

A: Given :- number of moles of aspirin (C9H8O4) in sample = 0.0745 mol  To calculate :- mass of aspirin…

Q: Lysine is an amino acid which has the following elemental composition: C, H, O, N. In one…

A: Lysine is an amino acid which has the following structure:

Q: Use the following data and steps below to calculate the formula of the copper chloride hydrate.…

A: Since you have posted a question with multiple sub-parts , we will solve first three subparts for…

Q: A compound is found to contain 69.6% sulfur with the remainder being nitrogen.  The molar mass of…

A: Let us assume, we have 100g of the compound. Calculate the number of moles of sulfur S and nitrogen…

Q: Phosphorous and sulfur form an extensive series of sulfides with the general formula PxSy. Determine…

A: Recall the measurements, %S=72.1 % Unknown = PxSy

Q: 1. Methanol, or wood alcohol, is the combustible material used in sterno. Write a balanced equation…

A: The balanced equation for the complete oxidation reaction that occurs when methanol (CH3OH) burns in…

Q: For the reaction represented by the equation 2H2 + O2 → 2H2O, what is the mole ratio of H2 to H2O?

A: Mole is a standard unit for measuring  large quantities of very small entities such as molecules.…

Q: Vitamin B12 , cyanocobalamin, is essential for human nutrition. It is concentrated in animal tissue…

A: The molar mass of cyanocobalamin is calculated using cobalt’s molar mass in step two.

Q: given the molar mass of Na2SO4.nH20 is 322.1 g/mol, calculate the value of n

A:

Q: How could you calculate the Avogadro’s number [NA] for an organic compound if you know the following…

A: Avogadro's number [NA] refers to the number of constituent particle such as atoms, molecules, ions…

Q: Determine the molecular formula of a compound with an empirical formula of NH2 and a formula mass of…

A: Given:-

Q: Quinine is used to treat malaria and has a molar mass of 325g/mol. If the empirical formula is…

A:

Q: Ascorbic acid (CsH&Os) is also known as Vitamin C. What quantity in molecules of CH&Os does a…

A: we know, moles is defined as the mass divided by the molar mass => moles = mass / molar mass…

Q: Nicotine, C10H14N2, is an alkaloid that is produced by "nightshade" family of plants as an…

A: we know, molar mass of : C = 12.01 g/mol , H = 1.007 g/mol , N = 14.01 g/mol =>molar mass of…

Q: Dichlorine heptoxide (Cl2O7) is a highly reactive compound used in some organic synthesis reactions.…

A:

Q: Citric acid (C6H$O7), named for its natural occurrence in citrus fruits, is produced in large…

A: Citric acid named for its natural occurrence in citrus fruits, is produced in large quantities…

Q: 15. Citric acid, C6H807 (aq), is often used as an additive to make candies "sour." a. Draw a…

A:

Q: Aspirin is a compound with the molecular formula C9H8O4. What is its percent composition?

A: The percentage composition of C in aspirin can be calculated as: Percent composition of C = Number…

Q: Polyethylene is a hydrocarbon polymer used to produce food-storage bags and many other flexible…

A: Given that,mass of polyethylene sample = 0.00126 g mass of CO2  = 0.00394 g mass of H2O = 0.00161 g…

Q: Calculate the molar mass of copper(II)chloride dihydrate.

A: Given :-  Molecular formula of copper(II)chloride dihydrate = CuCl2.2H2O  To be calculated :-  It's…

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.