16:49Introduction to Combustion Analysis, Empirical Formula & Molecular Formula ProblemsThe Organic Chemistry Tutor487
02:52Finding and Calculating an Empirical Formula of a Compound | How to Pass ChemistryMelissa Maribel2921
11:00Empirical Formula & Molecular Formula Determination From Percent CompositionThe Organic Chemistry Tutor386
Multiple ChoiceA compound that contains only carbon, hydrogen, and oxygen is composed of 48.64% C and 43.2% O by mass. What is the empirical formula of this compound?214372Has a video solution.
Multiple ChoiceElemental analysis of a sample of an ionic compound showed 2.82 g of Na, 4.35 g of Cl, and 7.83 g of O. What is the empirical formula of the compound?92351Has a video solution.
Open QuestionA compound composed of carbon, hydrogen, and chlorine contains 4.19 x 1023 hydrogen atoms. If 9.00 g of the compound also contains 55.0% chlorine by mass, what is the empirical formula?971153Has a video solution.
Multiple ChoiceIn order to make 1 s’ more, you need 2 graham crackers, 1 piece of chocolate, and 1 marshmallow. How many s’mores can be made from the following ingredients? 7 graham crackers, 6 pieces of chocolate, and 5 marshmallows140
Textbook QuestionThe following diagram represents the collection of elements formed by a decomposition reaction. (b) Could you draw a diagram representing the molecules of the compound that had been decomposed? Why or why not? 473Has a video solution.
Textbook QuestionThe following diagram represents the collection of elements formed by a decomposition reaction. (a) If the blue spheres represent N atoms and the red ones represent O atoms, what was the empirical formula of the original compound? 287Has a video solution.
Textbook QuestionThe following diagram represents the collection of CO2 and H2O molecules formed by complete combustion of a hydrocarbon. What is the empirical formula of the hydrocarbon?280Has a video solution.
Textbook QuestionDimethylhydrazine, a colorless liquid used as a rocket fuel, is 40.0% C, 13.3% H, and 46.7% N. What is the empirical formula? (LO 3.11) (a) CH4N9 (b) CH2N (c) C2H4N (d) C2H5N2622Has a video solution.
Textbook QuestionGive the empirical formula of each of the following compounds if a sample contains (c) 26.56% K, 35.41% Cr, and 38.03% O by mass.1007Has a video solution.
Textbook QuestionGive the empirical formula of each of the following compounds if a sample contains (b) 2.10 g nickel and 0.58 g oxygen265Has a video solution.
Textbook QuestionGive the empirical formula of each of the following compounds if a sample contains (a) 0.052 mol C, 0.103 mol H, and 0.017 mol O422Has a video solution.
Textbook QuestionThe structural formulas of the compounds n-butane and isobutane are shown below. (c) Which formulas—empirical, molecular, or structural—allow you determine these are different compounds? 244Has a video solution.
Textbook QuestionThe structural formulas of the compounds n-butane and isobutane are shown below. (b) Determine the empirical formula of each. 332Has a video solution.
Textbook QuestionDetermine the empirical formula of each of the following compounds if a sample contains (c) 89.14% Au and 10.86% O by mass.6251Has a video solution.
Textbook QuestionDetermine the empirical formula of each of the following compounds if a sample contains (b) 12.0 g calcium and 2.8 g nitrogen487Has a video solution.
Textbook QuestionDetermine the empirical formula of each of the following compounds if a sample contains (a) 3.92 mol C, 5.99 mol H, and 2.94 mol O334Has a video solution.
Textbook QuestionDetermine the empirical formulas of the compounds with the following compositions by mass: (b) 57.5% Na, 40.0% O, and 2.5% H412Has a video solution.
Textbook QuestionDetermine the empirical formulas of the compounds with the following compositions by mass: (a) 74.0% C, 8.7% H, and 17.3% N265Has a video solution.
Textbook QuestionWhat are the molecular and empirical formulas for each of the following compounds? Write the molecular formula for the following compound. 224Has a video solution.
Textbook QuestionDetermine the empirical formulas of the compounds with the following compositions by mass: (c) 60.0% C, 4.4% H, and the remainder O287Has a video solution.
Textbook QuestionDetermine the empirical formulas of the compounds with the following compositions by mass: (a) 42.1% Na, 18.9% P, and 39.0% O748Has a video solution.
Textbook QuestionTwo substances have the same molecular and empirical formulas. Does this mean that they must be the same compound?431Has a video solution.
Textbook QuestionWrite the empirical formula corresponding to each of the following molecular formulas: (e) C6H4Cl2387Has a video solution.
Textbook QuestionWrite the empirical formula corresponding to each of the following molecular formulas: (c) C4H8O2401Has a video solution.
Textbook QuestionWrite the empirical formula corresponding to each of the following molecular formulas: (b) C8H10590Has a video solution.
Textbook QuestionWrite the empirical formula corresponding to each of the following molecular formulas: (a) Al2Br6379Has a video solution.
Textbook QuestionDetermine the molecular and empirical formulas of the following: (b) the compound silicon tetrachloride, which has a silicon atom and four chlorine atoms and is used in the manufacture of computer chips761Has a video solution.
Textbook QuestionDetermine the molecular and empirical formulas of the following: (a) the organic solvent benzene, which has six carbon atoms and six hydrogen atoms527Has a video solution.
Textbook QuestionSilver metal reacts with chlorine (Cl2) to yield silver chlo-ride. If 2.00 g of Ag reacts with 0.657 g of Cl2, what is the empirical formula of silver chloride?421Has a video solution.
Textbook QuestionWhat are the empirical formulas of substances with the following mass percent compositions? (c) Sodium thiosulfate (photographic 'fixer'): 30.36% O, 29.08% Na, 40.56% S381Has a video solution.
Textbook QuestionWhat are the empirical formulas of substances with the following mass percent compositions? (b) Ilmenite (a titanium-containing ore): 31.63% O, 31.56% Ti, 36.81% Fe429Has a video solution.
Textbook QuestionWhat are the empirical formulas of substances with the following mass percent compositions? (a) Aspirin: 4.48% H, 60.00% C, 35.52% O825Has a video solution.
Textbook QuestionA chemist decomposes samples of several compounds; the masses of their constituent elements are listed. Calculate the empirical formula for each compound. c. 2.128 g Be, 7.557 g S, 15.107 g O13391Has a video solution.
Textbook QuestionA chemist decomposes samples of several compounds; the masses of their constituent elements are listed. Calculate the empirical formula for each compound. b. 2.677 g Ba, 3.115 g Br258Has a video solution.
Textbook QuestionA chemist decomposes samples of several compounds; the masses of their constituent elements are listed. Calculate the empirical formula for each compound. a. 1.245 g Ni, 5.381 g I364Has a video solution.
Textbook QuestionFerrocene, a substance proposed for use as a gasoline additive, has the percent composition 5.42% H, 64.56% C, and 30.02% Fe. What is the empirical formula of ferrocene?384Has a video solution.
Open QuestionCalculate the empirical formula for each stimulant based on its elemental mass percent composition. a. nicotine (found in tobacco leaves): C 74.03%, H 8.70%, N 17.27%1027
Open QuestionCalculate the empirical formula for each natural flavor based on its elemental mass percent composition. b. vanillin (responsible for the taste and smell of vanilla): C 63.15%, H 5.30%, O 31.55%615
Textbook QuestionWhat is the empirical formula of stannous fluoride, the first fluoride compound added to toothpaste to protect teeth against decay? Its mass percent composition is 24.25% F, 75.75% Sn.363Has a video solution.
Open QuestionCalculate the empirical formula for each natural flavor based on its elemental mass percent composition. a. methyl butyrate (component of apple taste and smell): C 58.80%, H 9.87%, O 31.33%702
Textbook QuestionWhat are the empirical formulas of each of the following substances? (c) Zircon, a mineral from which cubic zirconia is made: 34.91% O, 15.32% Si, 49.77% Zr395Has a video solution.
Textbook QuestionWhat are the empirical formulas of each of the following substances? (b) Magnetite, a naturally occurring magnetic mineral: 72.36% Fe, 27.64% O440Has a video solution.
Textbook QuestionWhat are the empirical formulas of each of the following substances? (a) Ibuprofen, a headache remedy: 75.69% C, 15.51% O, 8.80% H389Has a video solution.
Textbook QuestionThe elemental mass percent composition of ibuprofen (a nonsteroidal anti-inflammatory drug [NSAID]) is 75.69% C, 8.80% H, and 15.51% O. Determine the empirical formula of ibuprofen.801Has a video solution.
Textbook QuestionThe elemental mass percent composition of ascorbic acid (vitamin C) is 40.92% C, 4.58% H, and 54.50% O. Determine the empirical formula of ascorbic acid.1308Has a video solution.
Textbook QuestionA 45.2-mg sample of phosphorus reacts with selenium to form 131.6 mg of the selenide. Determine the empirical formula of phosphorus selenide.12321Has a video solution.
Textbook QuestionCombustion analysis of a 31.472 mg sample of the widely used flame retardant Decabrom gave 1.444 mg of CO2. Is the molecular formula of Decabrom C12Br10 or C12Br10O?255Has a video solution.
Textbook QuestionHeating elemental cesium and platinum together for two days at 973 K gives a dark red ionic compound that is 57.67% Cs and 42.33% Pt. (a) What is the empirical formula of the compound?235Has a video solution.
Textbook QuestionUnder special conditions, sulfur reacts with anhydrous liquid ammonia to form a binary compound of sulfur and nitrogen. The compound is found to consist of 69.6% S and 30.4% N. Measurements of its molecular mass yield a value of 184.3 g>mol. The compound occasionally detonates on being struck or when heated rapidly. The sulfur and nitrogen atoms of the molecule are joined in a ring. All the bonds in the ring are of the same length. (a) Calculate the empirical and molecular formulas for the substance.557Has a video solution.
Textbook QuestionA copper wire having a mass of 2.196 g was allowed to react with an excess of sulfur. The excess sulfur was then burned, yielding SO2 gas. The mass of the copper sulfide produced was 2.748 g. (b) What is its empirical formula?291Has a video solution.
Textbook QuestionAn herbicide is found to contain only C, H, N, and Cl. The complete combustion of a 100.0-mg sample of the herbicide in excess oxygen produces 83.16 mL of CO2 and 73.30 mL of H2O vapor expressed at STP. A separate analysis shows that the sample also contains 16.44 mg of Cl. (c) What other information would you need to know about this compound to calculate its true molecular formula?412Has a video solution.
Textbook QuestionReaction of gaseous fluorine with compound X yields a sin- gle product Y, whose mass percent composition is 61.7% F and 38.3% Cl. (a) What is a probable molecular formula for product Y, and what is a probable formula for X?291Has a video solution.
Open QuestionA chemist decomposes samples of several compounds; the masses of their constituent elements are listed. calculate the empirical formula for each compound.71Has a video solution.
Open QuestionBased on the mole ratio you determined in part c, what is the empirical formula of this compound?140Has a video solution.
Open QuestionA sample of an iron-containing compound is 22.0% iron, 50.2% oxygen, and 27.8% chlorine by mass.58Has a video solution.
Open QuestionA molecule's molecular formula and its empirical formula always share the same chemical properties138Has a video solution.
Open QuestionWhich of the following statements about empirical formulas is incorrect?60Has a video solution.
Open QuestionA substance has a molecular formula of c8h10n4o2. the empirical formula is -75Has a video solution.
Open QuestionWhat are the subscripts in the empirical formula of this compound?69Has a video solution.
Open QuestionThe lowest whole number ratio of the elements in a compound is called60Has a video solution.
Open QuestionDetermine the empirical formula for a compound that contains C, H and O. It contains 52.14% C and 34.73% O by mass.21Has a video solution.
Open QuestionDetermine the empirical formula for a compound that is 36.86% N and 63.14% O by mass.28Has a video solution.
