Questions: Decide whether the Lewis structure proposed for each molecule is reasonable or not. molecule proposed Lewis structure Is this a reasonable structure? If not, why not? BF3 : F: : F-B-F: Yes, it's a reasonable structure. No, the total number of valence electrons is wrong. The correct number is: No, some atoms have the wrong number of electrons around them. The symbols of the problem atoms are: NH2+ [H-N=H]+ Yes, it's a reasonable structure. No, the total number of valence electrons is wrong. The correct number is: No, some atoms have the wrong number of electrons around them. The symbols of the problem atoms are: BH2+ [H-B-H]+ Yes, it's a reasonable structure. No, the total number of valence electrons is wrong. The correct number is: No, some atoms have the wrong number of electrons around them. The symbols of the problem atoms are: * If two or more atoms have the wrong number of valence electrons around them, just enter the chemical symbol for the atom as many times as necessary. For example, if two oxygen atoms have the wrong number of electrons around them, enter the symbol O twice.

Decide whether the Lewis structure proposed for each molecule is reasonable or not. molecule proposed Lewis structure Is this a reasonable structure? If not, why not? BF3 : F: : F-B-F: Yes, it's a reasonable structure. No, the total number of valence electrons is wrong. The correct number is: No, some atoms have the wrong number of electrons around them. The symbols of the problem atoms are: NH2+ [H-N=H]+ Yes, it's a reasonable structure. No, the total number of valence electrons is wrong. The correct number is: No, some atoms have the wrong number of electrons around them. The symbols of the problem atoms are: BH2+ [H-B-H]+ Yes, it's a reasonable structure. No, the total number of valence electrons is wrong. The correct number is: No, some atoms have the wrong number of electrons around them. The symbols of the problem atoms are: * If two or more atoms have the wrong number of valence electrons around them, just enter the chemical symbol for the atom as many times as necessary. For example, if two oxygen atoms have the wrong number of electrons around them, enter the symbol O twice.
Transcript text: Decide whether the Lewis structure proposed for each molecule is reasonable or not. molecule & proposed Lewis structure & Is this a reasonable structure? If not, why not? $\mathrm{BF}_{3}$ & $\quad: \mathrm{F}:$ $: \ddot{\mathrm{F}}-\mathrm{B}-\ddot{\mathrm{F}:}$ & Yes, it's a reasonable structure. No, the total number of valence electrons is wrong. The correct number is: No, some atoms have the wrong number of electrons around them. The symbols of the problem atoms are: $\mathrm{NH}_{2}^{+}$ & {$[\mathrm{H}-\mathrm{N}=\mathrm{H}]^{+}$} & Yes, it's a reasonable structure. No, the total number of valence electrons is wrong. The correct number is: No, some atoms have the wrong number of electrons around them. The symbols of the problem atoms are: $\mathrm{BH}_{2}^{+}$ & {$[\mathrm{H}-\mathrm{B}-\mathrm{H}]^{+}$} & Yes, it's a reasonable structure. No, the total number of valence electrons is wrong. The correct number is: No, some atoms have the wrong number of electrons around them. The symbols of the problem atoms are: * If two or more atoms have the wrong number of valence electrons around them, just enter the chemical symbol for the atom as many times as necessary. For example, if two oxygen atoms have the wrong number of electrons around them, enter the symbol O twice.
failed

Solution

failed
failed

Solution Steps

Step 1: Analyze the Lewis Structure for \(\mathrm{BF}_3\)

  • Valence Electrons Calculation:

    • Boron (B) has 3 valence electrons.
    • Each Fluorine (F) has 7 valence electrons.
    • Total: \(3 + 3 \times 7 = 24\) valence electrons.

  • Structure Evaluation:

    • The proposed structure shows each F with a full octet and B with 6 electrons.
    • Boron is known to be stable with 6 electrons in some compounds.

  • Conclusion:

    • The structure is reasonable as it follows the known behavior of boron.
Step 2: Analyze the Lewis Structure for \(\mathrm{NH}_2^+\)

  • Valence Electrons Calculation:

    • Nitrogen (N) has 5 valence electrons.
    • Each Hydrogen (H) has 1 valence electron.
    • Positive charge indicates loss of 1 electron.
    • Total: \(5 + 2 \times 1 - 1 = 7\) valence electrons.

  • Structure Evaluation:

    • The proposed structure shows N with a double bond to one H and a single bond to the other.
    • This results in N having 6 electrons, which is incorrect.

  • Conclusion:

    • The structure is not reasonable. The problem atom is N.
Step 3: Analyze the Lewis Structure for \(\mathrm{BH}_2^+\)

  • Valence Electrons Calculation:

    • Boron (B) has 3 valence electrons.
    • Each Hydrogen (H) has 1 valence electron.
    • Positive charge indicates loss of 1 electron.
    • Total: \(3 + 2 \times 1 - 1 = 4\) valence electrons.

  • Structure Evaluation:

    • The proposed structure shows B with two single bonds to H.
    • This results in B having 4 electrons, which is typical for boron in cationic species.

  • Conclusion:

    • The structure is reasonable.

Final Answer

  • \(\mathrm{BF}_3\): \(\boxed{\text{Yes, it's a reasonable structure.}}\)
  • \(\mathrm{NH}_2^+\): \(\boxed{\text{No, some atoms have the wrong number of electrons around them. The symbols of the problem atoms are: N}}\)
  • \(\mathrm{BH}_2^+\): \(\boxed{\text{Yes, it's a reasonable structure.}}\)
Was this solution helpful?
failed
Unhelpful
failed
Helpful

Questions asked by other users

failedAnswered
Use the differentiation rules developed in this section to find the derivatives of the functions in Exercises 35-64. Note that it may be necessary to do some preliminary algebra before differentiating. 35. f(x)=4-3x^7
failedAnswered
Which of the following is a long-term goal? a. Saving for a vacation this summer b. Saving for a kitchen remodel c. Cutting 10% off next month's grocery bill d. Saving for retirement
failedAnswered
A waiver of the requirement for documentation of informed consent may be granted when: - The only record linking the subject and the research is the consent document and the principal risk is a breach of confidentiality. - The investigator has no convenient place to store signed consent forms separate from the research data. - Potential subjects might find some of the research questions embarrassing, personal, or intrusive. - The subjects are literate in their own language; however, they do not read, write, or speak English.
failedAnswered
310 points If the initial velocity of a car is 8.46 meters per second and its final velocity is 9544 meters per second, what is its acceleration in meters per second squared if it takes 1.94 sec to make this change? Round your answer to two decimal places. Type your answer
failedAnswered
Bacteria that are especially demanding when it comes to their nutritional requirements are called needy fastidious bossy demanding