1.2-gg sample of carbon dioxide (CO2CO2) is fully decomposed into its elements, yielding 0.314 gg of carbon and 0.836 gg of oxygen. If a sample of a different compound decomposes into 0.429 g of carbon and 0.571 g of oxygen, what is its ratio of the mass of O to C? Express your answer to three significant figures. 15| ΑΣΦ ? What is the ratio of the mass of O to C? Express your answer to three significant figures.

1.2-gg sample of carbon dioxide (CO2CO2) is fully decomposed into its elements, yielding 0.314 gg of carbon and 0.836 gg of oxygen. If a sample of a different compound decomposes into 0.429 g of carbon and 0.571 g of oxygen, what is its ratio of the mass of O to C? Express your answer to three significant figures. 15| ΑΣΦ ? What is the ratio of the mass of O to C? Express your answer to three significant figures.

Chemistry: Principles and Reactions

8th Edition

ISBN:9781305079373

Author:William L. Masterton, Cecile N. Hurley

Publisher:William L. Masterton, Cecile N. Hurley

Chapter2: Atoms, Molecules, And Ions

Section: Chapter Questions

Problem 85QAP

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A sample of cocaine, C17H21O4N, is diluted with sugar, C12H22O11. When a 1.00-mg sample of this mixture is burned, 1.00 mL of carbon dioxide (d=1.80g/L) is formed. What is the percentage of cocaine in this mixture?
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Calculate the average density of a single Al-27 atom by assuming that it is a sphere with a radius of 0.143 nm. The masses of a proton, electron, and neutron are 1.67261024g,9.10941028g, and 1.67491024g, respectively. The volume of a sphere is 4r3/3, where r is its radius. Express the answer in grams per cubic centimeter. The density of aluminum is found experimentally to be 2.70 g/cm3. What does that suggest about the packing of aluminum atoms in the metal?
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