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tester [92]
2 years ago
12

Determine the identity of the daughter nuclide from the electron capture by 3517cl. determine the identity of the daughter nucli

de from the electron capture by . 4019k 3218ar 3516s 3215p 3718ar
Chemistry
1 answer:
brilliants [131]2 years ago
4 0

Answer:

  •           ^{35}_{16}S

Explanation:

When the nucleus of an <em>atom captures and electron</em>, such electron combines with a proton and forms a neutron. Thus, the mass number remains the same (just a proton has been converted into a neutron) but the atomic number (the number of protons) decrease in one.

Then, the daughter nuclide will have the same mass number and the atomic number reduced in one.

The given parent isotope is    ^{35}_{17}Cl,    which means that it has these features:

  • Chemical symbol: Cl
  • Name of the element: chlorine
  •  Mass number (the superscript to the left): 35
  •  Atomic number (the subscript to the left): 17

And the daughter nuclide after the electron capture will be:

  • Mass number: 35 (the same of the parent nuclide)
  • Atomic number: 17 - 1 = 16
  • Identity: sulfur (search the element with atomic number 16 in a periodic table).
  • Chemical symbol: S

  • Idenity of the daughter nuclide using the isotope notation:

          ^{35}_{16}S

Hence, the answer is the third choice.

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Consider the following reaction:C2H4(g) + F2(g) -----------&gt; C2H4F2(g) Delta H = -549 kJEstimate the carbon-fluorine bond ene
frutty [35]

Answer:

Bond energy of carbon-fluorine bond is 485 kJ/mol

Explanation:

Enthalpy change for a reaction,  is given as:

\Delta H_{rxn}=\sum [n_{i}\times (E_{bond})_{i}]-\sum [n_{j}\times (E_{bond})_{j}]

Where (E_{bond})_{i}  and (E_{bond})_{j} represents average bond energy in breaking "i" th bond and forming "j" th bond respectively.n_{i} and n_{j} are number of moles of bond break and form respectively.

In this reaction, one mol of C=C, four moles of C-H and one mol of F-F bonds are broken. One mol of C-C bond, four moles of C-H bonds and two moles of C-F bonds are formed

So, -549kJ=(1mol\times 614kJ/mo)+(4mol\times E_{C-H})+(1mol\times 154kJ/mol)-(1mol\times 347kJ/mol)-(4mol\times E_{C-H})-(2mol\times E_{C-F})

or, -549kJ=(1mol\times 614kJ/mo)+(1mol\times 154kJ/mol)-(1mol\times 347kJ/mol)-(2mol\times E_{C-F})

or, E_{C-F}=485kJ/mol

So bond energy of carbon-fluorine bond is 485 kJ/mol

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Hi there!

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Hope that helps!
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