Aspirin has the molecular formula C3HO4. 1. What is the % C in aspirin by mass in aspirin? 2. What is the % O in aspirin by mass in aspirin? 3. An oxide of chromium is made up of 5.20 g chromium and 5.60 g oxygen. What is the empirical formula of the oxide? 4. An oxide of nitrogen contains 63.1% oxygen and has a molar mass of the compound is 76.0 g/mol. What is the empirical formula for this compound? What is the molecular formula for this compound? Please use the following set of molar masses for uniformity of answers:

Aspirin has the molecular formula C3HO4. 1. What is the % C in aspirin by mass in aspirin? 2. What is the % O in aspirin by mass in aspirin? 3. An oxide of chromium is made up of 5.20 g chromium and 5.60 g oxygen. What is the empirical formula of the oxide? 4. An oxide of nitrogen contains 63.1% oxygen and has a molar mass of the compound is 76.0 g/mol. What is the empirical formula for this compound? What is the molecular formula for this compound? Please use the following set of molar masses for uniformity of answers:

Chemistry: The Molecular Science

5th Edition

ISBN:9781285199047

Author:John W. Moore, Conrad L. Stanitski

Publisher:John W. Moore, Conrad L. Stanitski

Chapter2: Chemical Compounds

Section: Chapter Questions

Problem IVSP: Dioxathion, a pesticide, contains carbon, hydrogen, oxygen, phosphorus, and sulfur. The compound has...

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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?
Consider the following diagram, where atom X is represented by a square and atom Y is represented by a circle. (a) Write the equation for the reaction represented by the diagram. (b) If each circle stands for a mole of Y and each square a mole of X, how many moles of X did one start with? How many moles of Y? (c) Using the same representation described in part (b), how many moles of product are formed? How many moles of X and Y are left unreacted?
Tetrodotoxin is a toxic chemical found in fugu pufferfish, a popular but rare delicacy in Japan. This compound has an LD50 (the amount of substance that is lethal to 50.% of a population sample) of 10.g per kg of body mass. Tetrodotoxin is 41.38% carbon by mass, 13.16% nitrogen by mass, and 5.37% hydrogen by mass, with the remaining amount consisting of oxygen. What is the empirical formula of tetrodotoxin? If three molecules of tetrodotoxin have a mass of 1.59 1021 g, what is the molecular formula of tetrodotoxin? What number of molecules of tetrodotoxin would be the LD50 dosage for a person weighing 165 lb?
Moles within Moles and Molar Mass Part 1: a How many hydrogen and oxygen atoms are present in 1 molecule of H2O? b How many moles of hydrogen and oxygen atoms are present in 1 mol H2O? c What are the masses of hydrogen and oxygen in 1.0 mol H2O? d What is the mass of 1.0 mol H2O? Part 2: Two hypothetical ionic compounds are discovered with the chemical formulas XCl2 and YCl2, where X and Y represent symbols of the imaginary elements. Chemical analysis of the two compounds reveals that 0.25 mol XCl2 has a mass of 100.0 g and 0.50 mol YCl2 has a mass of 125.0 g. a What are the molar masses of XCl2 and YCl2? b If you had 1.0-mol samples of XCl2 and YCl2, how would the number of chloride ions compare? c If you had 1.0-mol samples of XCl2 and YCl2, how would the masses of elements X and Y compare? d What is the mass of chloride ions present in 1.0 mol XCl2 and 1.0 mol YCl2? e What are the molar masses of elements X and Y? f How many moles of X ions and chloride ions would be present in a 200.0-g sample of XCl2? g How many grams of Y ions would be present in a 250.0-g sample of YCl2? h What would be the molar mass of the compound YBr3? Part 3: A minute sample of AlCl3 is analyzed for chlorine. The analysis reveals that there are 12 chloride ions present in the sample. How many aluminum ions must be present in the sample? a What is the total mass of AlCl3 in this sample? b How many moles of AlCl2 are in this sample?
Copper(I) iodide (CuI) is often added to table salt as a dietary source of iodine. How many moles of CuI Are contained in 1.00 lb (454 g) of table salt containing 0.0100% CuI by mass?
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Small amounts of tungsten (W) are usually added to steel to strengthen and harden the steel. Two ores of tungsten are ferberite (FeWO4) and scheelite (CaWO4). How many grams of FeWO4 would contain the same mass of tungsten that is present in 725 g of CaWO4?
3.79 Consider two samples. Sample A contains 2 moles of N2 and 1 mole of O2, and Sample B contains 1 mole of N2O5. (a) Which sample contains more molecules? (b) Which sample contains more oxygen atoms? (c) Which sample contains more nitrogen atoms?
hat is the difference between the empirical and molecular for mulas of a compound? Can they ever be the same? Explain.
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The compound butyric acid gives rancid butter its characteristics odor. A). What is the molecular formula of butyric acid? (Black spheres are oxygen.) B). What is the empirical formula of butyric acid? C). What is the mass percent composition of butyric acid? D). How many grams of C are in 0.850 g of butyric acid? E). How many grams of butyric acid contain 3.28 ×10^23 O atoms? F). Butyric acid has a density of 0.959g/mL at 20^0C. How many moles of butyric acid are contained in 0.565 mL of butyric acid?.