EBK INTRODUCTORY CHEMISTRY
8th Edition
ISBN: 9780134553153
Author: CORWIN
Publisher: PEARSON CO
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Chapter 12, Problem 20KT
Interpretation Introduction
Interpretation:
The key term corresponding to the definition “a method of indicating a partial positive and a partial negative charge in a
Concept introduction:
Atoms in a molecule or a compound try to complete their octets by either gaining or losing electrons or by sharing electrons. Covalent compounds are those compounds that are formed by sharing electrons between atoms. Ionic compounds are those in which the atoms lose or gain an electron from the other atom present in the compound.
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Don't used hand raiting
The following 'H NMR spectrum was taken with a 750 MHz spectrometer:
1.0
0.5
0.0
10.0
9.0
8.0
7.0
6.0
5.0
4.0
3.0 ' 2.0
1.0
0.0
(ppm)
What is the difference Av
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ac
Δν
ac
radiation absorbed by the a and c protons? (Note:
it's not equal to the difference in chemical shifts.)
Round your answer to 2 significant digits, and be
sure it has an appropriate unit symbol.
=
O
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O a will shift right, c will shift left.
a and c will both shift left, with more space
between them.
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spectrometer. What will be true about this new
spectrum?
O
a and c will both shift left, with less space
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O
a and c will both shift right, with more space
between them.
O
a and c will both shift right, with less space
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O None of the above.
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C
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What mass of Na2CO3 must you add to 125g of water to prepare 0.200 m Na2CO3? Calculate mole fraction of Na2CO3, mass percent, and molarity of the resulting solution. MM (g/mol): Na2CO3 105.99; water 18.02. Final solution density is 1.04 g/mL.
Chapter 12 Solutions
EBK INTRODUCTORY CHEMISTRY
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