[References]IN TERACTIVE EXAMPLE Calculating a Formula from Percent CompositionValeric acid is an organic acid composed of carbon, hydrogen, and oxygen. Valeric acid has a molar mass of 102.13 g/mol and is 58.80%C, 9.87% H, and the remainder is oxygen. What are the empirical and molecular formulas of valeric acid?Empirical formula:Molecular formula:Show Approach Show Tutor StepsSubmitTry Another VersionSubmit Answer3:53 PM2/9/2020FLUsearch,Chp

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Answered: [References] IN TERACTIVE EXAMPLE…

Chemistry: Matter and Change

1st Edition

ISBN:9780078746376

Author:Dinah Zike, Laurel Dingrando, Nicholas Hainen, Cheryl Wistrom

Publisher:Dinah Zike, Laurel Dingrando, Nicholas Hainen, Cheryl Wistrom

Chapter11: Stoichiometry

Section: Chapter Questions

Problem 115A

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itamin B12 , cyancobalamin, is essential for human nutrition. Its molecular formula is C63H88CoN14O14P . A lack of this vita min in the diet can lead to anemia. Cyanocohalamin is the form of the vitamin found in vitamin supplements. l type='a'> What is the molar mass of cyanocobalamin to two decimal places? How many moles of cyanocohalamin molecules are present in 250 mg of cyanocobalamin? What is the mass of 0.60 mole of cyanocobalamin? How many atoms of hydrogen are in 1 .0 mole of cyanocobalamin? What is the mass of 1.0107 molecules of cyanocobalamin? What is the mass (in grams) of one molecule of cyanocobalamin?
Calculate the percent by mass of the element listed first in the formulas for each of the following compounds. methane, CH4 sodium nitrate, NaNO3 carbon monoxide, CO nitrogen dioxide, NO2 1-octanol, C8H18O calcium phosphate, Ca3( PO4)2 3-phenyiphenol, C12H10O aluminum acetate, Al(C2H3O2)3
Only typed explanation otherwise leave it What is the empirical formula of a compound composed of 3.25% hydrogen (H),19.36% carbon (C), and 77.39% oxygen (O) by mass? Insert subscripts as needed. empirical formula:
Which of the following is an example of an empirical formula? A. C9H12 B. C9H18Cl2 C. N2O4 D. C2H2O2
Make a Venn Diagram on empirical and molecular formulas.
Only need help with subpart "d" Use the following data and steps below to calculate the formula of the copper chloride hydrate. Empty aluminum pan was 0.4661 g. A 0.8390 g sample of CuCl2*xH20 was placed in the pan and heated. The final mass of the brown CuCl2 in the aluminum pan was 1.1357 g. a. How many moles of water evaporated? 0.00941 b. Calculate the moles of dry copper chloride. 0.00498 c. How many water per copper chloride? Round it to the nearest whole number and determine the formula of the starting hydrate. 2 d. A common hydrate for copper (II) chloride is the di-hydrate: CuCl2×2(H2O). Assume that the starting hydrate was this and calculate the theoretical yield of anhydrous copper chloride.
Show all work for all problems for full creditPercent CompositionCalculate the percent composition of each element in the following compounds 1.Iron (III) Oxide2.K2CO3 Empirical FormulaDetermine the empirical formula for each compound.6. A compound contains 0.0130 mol carbon, 0.0390 mol hydrogen, and 0.0065 mole oxygen.7. A compound consists of 72.2% magnesium and 27.8% nitrogen.8. Phosphoric Acid is found in some soft drinks. A sample of phosphoric acid contains 0.3086 g of hydrogen, 3.161 g of phosphorus, and 6.531 g oxygen.
Calculate the number of molecules in each of the following samples. (Remember from class that the molecular weight is simply a conversion factor that allows us to convert grams to moles for a particular substance or convert moles to grams. And, Avogadro’s number allows us to convert from moles to atoms or molecules of a substance) a. 4.75 millimoles of phosphine, PH3 b. 4.75 g of phosphine, PH3
1. Define Avogadro's number? explain w/ applications 2. What is a mole? 3. How are Avogadro's number and mole related, for element and/or compound?
*Show all work for all problems for full creditPercent CompositionCalculate the percent composition of each element in the following compounds 2.Ca3(PO4)23. HCl4. Iron (III) Oxide5. K2CO3 Empirical FormulaDetermine the empirical formula for each compound.6. A compound contains 0.0130 mol carbon, 0.0390 mol hydrogen, and 0.0065 mole oxygen.7. A compound consists of 72.2% magnesium and 27.8% nitrogen.8. Phosphoric Acid is found in some soft drinks. A sample of phosphoric acid contains 0.3086 g of hydrogen, 3.161 g of phosphorus, and 6.531 g oxygen.
which of the following represents an empirical formula? C3H6O2 Au2Cl6 C6H6 all of them or Hg2(NO3)2
A sample of aspirin (acetyl salicyclic acid) of molecular mass 180, on analysis was found to contain60% carbon, 4.4% hydrogen and 35.6% oxygeni.Determine the empirical formula of aspirinii. What is the molecular formula of aspirin?iii. State the technique that can be used to determine the molecular weight of aspirin

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