Examine the labeled bonds in the structures below and determine the relative length for each row. Structure S a SH Which bond is shorter? (Choose one) a b H H H (Choose one) ☑

QUESTION 45 Draw the electron-dot symbols for C, H, and N atoms, and answer the following questions: How many valence electrons on C 74 How many valence electrons on H? 1 How many valence electrons on N7-7 Draw the Lewis structure for the following compound, and answer the following questions: CHÍNH How many total bonds are formed? (Total number of shared electron pairs, count single bonds as 1, double bonds as 2, triple bonds as 3) How many unbonded electron pairs (one pairs) are left?

Draw the Lewis structure of BH4- and use your Lewis structure to help fill in the missing numbers. Hint: you must put a number in each box. If the answer is zero, you must enter "0". The Lewis structure has:       lone pairs =       single bonds =       double bonds =       triple bonds =       atoms with a positive formal charge =       atoms with a negative formal charge =   Is this structure stabilised by resonance? (Enter either yes or no below - no other words).

13) Give the correct bond-line structure for the following compounds (drawing bonds as lines). Clearly show all bonds, electron pairs, and formal charges when present. Ionic bonds, if present, must be clearly marked using formal charges. (CH3)2CHCHBrOH Na o N o

How many valence electrons are there in a correctly drawn Lewis structure for formamide, HCONH2  ( You should also be able to draw the lewis structure for this. Hint, the C is in the center with an O ,N and 1 H attached. The other H atoms are attached to the N)

Answer the questions in the table below about the shape of the methanone (H₂CO) molecule. How many electron groups are around the central carbon atom? Note: one "electron group" means one lone pair, one single bond, one double bond, or one triple bond. What phrase best describes the arrangement of these electron groups around the central carbon atom? (You may need to use the scrollbar to see all the choices.) (choose one) X S

#2

Please answer only question 3

97. Which of the following molecules and ions contain polar bonds? Which of these molecules and ions have dipole moments? (a) CIF5 polar bond? [ Select] dipole? [Select] (b) CIO2 polar bond? [Select ] dipole? [ Select ] (c) TeCla2- polar bond? [Select ] dipole? [Select] 99+

10.) The structural formula of a certain aldehyde (related to formaldehyde) is H3C-CH2-CHO.  Draw a Lewis structure for this aldehyde and determine the number of bonds present.  Note that a single or a double or a triple bond counts as one bond. Write the number, not the word.