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Science

Chemistry

atoms

Chemistry for Engineering Students

3rd Edition

ISBN:9781285199023

Author:Lawrence S. Brown, Tom Holme

Publisher:Lawrence S. Brown, Tom Holme

Chapter3: Molecules, Moles, And Chemical Equations

Section: Chapter Questions

Problem 3.86PAE: Consider two samples of liquid: 1 mole of water (H2O) and 1 mole of ethanol (C2H50H). Answer each of...

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Concept explainers

Atoms and Molecules

An atom is the smallest unit of an element that possesses all the properties of that particular element. Molecules are the smallest unit of a substance that possess all the properties of that particular substance.

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The molar mass of water is 18.01528 g/mol. How many hydrogen and oxygen atoms are present in 10.0 g of water, H2O? Question 5 options: a) 6.68 mc008-7.jpg 1023 atoms of hydrogen and 6.68 mc008-8.jpg 1023 atoms of oxygen b) 3.34 mc008-5.jpg 1023 atoms of hydrogen and 3.34 mc008-6.jpg 1023 atoms of oxygen c) 2.16 mc008-3.jpg 1026 atoms of hydrogen and 1.08 mc008-4.jpg 1026 atoms of oxygen d) 6.68 mc008-1.jpg 1023 atoms of hydrogen and 3.34 mc008-2.jpg 1023 atoms of oxygen How many molecules are in a 2.00 g sample of hydrogen peroxide, H2O2? The molar mass of H is 1.01 g/mol, and the molar mass of O is 16.00 g/mol. Question 6 options: a) 7.08 mc007-1.jpg 1022 molecules b) 2.05 mc007-2.jpg 102 molecules c) 3.54 mc007-4.jpg 1022 molecules d) 5.65 mc007-3.jpg 10-23 molecules

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