Q2 please, and Q3 and Q4 if u want to Q2) How many molecules of ethane (C2H6) are present in 0.334 g of C2H6?Q1) How many moles of cobalt (Co) atoms are there in 6.00 X 10 (6 billion) Co atoms?thetr many years chloroform (CHCI3) was used as an inhalation anesthetic in spite of the factar it is also a toxic substance that may cause severe liver, kidney, and heart damage. Calculatethe percent composition by mass of this compound.Q4) Lithium , is used in dry cells and storage batteries and in high temperature lubricants, ithas two naturally occurring isotopes, Li and 'Li. Calculate the atomic mass of lithium.isotopesisotopic mass(amu)abundance(%)Li7Li6.015217.0160037.5092.50

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Q2) How many molecules of ethane (C2H6) are present in 0.334 g of C2H6? 03)

Chemistry for Engineering Students

4th Edition

ISBN:9781337398909

Author:Lawrence S. Brown, Tom Holme

Publisher:Lawrence S. Brown, Tom Holme

Chapter3: Molecules, Moles, And Chemical Equations

Section: Chapter Questions

Problem 3.123PAE: 3.123 Most periodic tables provide molar masses with four or five significant figures for the...

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Concept explainers

Mole Concept

Mole concept is a method to determine the amount of any substance that consists of some elemental particles using a grouping unit called ‘mole’. The mole concept enables one to handle the large amount of small elementary particles. The mole concept can be used in many calculations related to mole calculation, molar amount, mole ratio, and so on, which are significant in chemistry.

Question

Q2 please, and Q3 and Q4 if u want to

Q2) How many molecules of ethane (C2H6) are present in 0.334 g of C2H6?
Q1) How many moles of cobalt (Co) atoms are there in 6.00 X 10 (6 billion) Co atoms?
thetr many years chloroform (CHCI3) was used as an inhalation anesthetic in spite of the fact
ar it is also a toxic substance that may cause severe liver, kidney, and heart damage. Calculate
the percent composition by mass of this compound.
Q4) Lithium , is used in dry cells and storage batteries and in high temperature lubricants, it
has two naturally occurring isotopes, Li and 'Li. Calculate the atomic mass of lithium.
isotopes
isotopic mass(amu)
abundance(%)
Li
7Li
6.01521
7.016003
7.50
92.50

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