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mr_godi [17]
3 years ago
11

20 points and brainliest for best answer

Chemistry
2 answers:
notka56 [123]3 years ago
8 0
You can find the atomic mass of each on any standard periodic table.
Gold (Au): 196.97
Potassium (K): 39.098
Francium (Fr): 223
Copper (Cu): 63.546
Bromine (Br): 79.904
Arsenic (As): 74.992
Uranium (U): 238.03
Chromium (Cr): 51.996
Mercury(Hg): 200.59
Hydrogen (H): 1.008

~I hope this helps!~
RSB [31]3 years ago
7 0
Gold/Atomic mass

196.96657 u ± 0.000004 u

Potassium/Atomic mass

39.0983 u ± 0.0001 u

Francium/Atomic number

87

Copper/Atomic mass

63.546 u ± 0.003 u


Bromine/Atomic mass

79.904 u ± 0.001 u


Arsenic/Atomic number

33


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Choose the molecule(s) that will only show two signals, with an integration ratio of 2:3, in their 1H NMR spectrum.
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The question is missing the molecules in which the integration ratio of 2:3 will be observed. The complete question is given in the attachment.

Answer:

Molecule (a), (c), and (f) will show two peaks with the integration ratio of 2:3 in their 1H NMR spectrum

Explanation:

In the 1H NMR spectrum, the peak area is dependent on the number of hydrogen in a specific chemical environment. Hence, the ratio of the integration of these signals provides us with the relative number of hydrogen in two peaks. This rationale is used for the assignment of molecules that will give 2:3 integration ratio in the given problem.

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  • Molecule (e) have three CH and three CH₃ groups, so their ratio will become 1:3
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