Determine the molecular formula and molecular mass of the compound represented by the chemical structure. Round your answer for the molecular mass to the hundredths place. Lines represent bonds between adjacent atoms. H molecular formula: CH₂OH Incorrect molecular mass: 150.13 Incorrect amu H H H C

Acrolein is the starting material for certain plastics. (a) Which bonds in the molecule are polar and which are nonpolar? (b) Which is the most polar bond in the molecule? Which atom is the partial negative end of this bond?

A compound with a molar mass of about 28 g/mol contains 85.7% carbon and 14.3% hydrogen by mass. Write the Lewis structure for a molecule of the compound.

7.30 The bond in HF is said to be polar, with the hydrogen carrying a partial positive charge. For this to be true, the hydrogen atom must have less than one electron around it. Yet the Lewis dot structure of HF attributes two electrons to hydrogen. Draw a picture of the electron density distribution for HF and use it to describe how the hydrogen atom can carry a partial positive charge. How can these two models of the HF bond (the electron density and the Lewis structure) seem so different and yet describe the same thing?

Sort the following compounds according to bond type: lonic Covalent :: KCI : CH2COOH :: Water :: Ag2S

Examples: Example: H▬N▬H HIN: Examples: :F Н lone pair : -bond pair (2 e-) single bond :F: Non-Polar 8+. H :F: H:Cl: HCl:o is better represented as closer to Cl due to its greater electronegativity. Thus, HCl contains a polar covalent bond. H :0: Polar lone pair 8- :S H -S= :0: 2 bond pairs (4 e-) double bond because the bond electrons are pulled F: Pola

The CO32- ion has three resonance structures. Predict the molecular shape ofeach of the three resonance structures. What does this result tell you aboutthe importance of considering each resonance structure when determiningthe shape of a molecule?

A molecule is connected H₂CC (O) CH₂ where the oxygen is connected to the middle carbon and the outside carbons are also connected to the middle carbon. The hydrogens are connected to the outside carbons. Which of the following represents the Lewis Dot Structure for this compound? A) B) H-C-C-C-H C) H H OB H DE OD DA DC H H H 80: H H H-C-C-C-H HC- H-C-C=C-H Both A and B are correct H o: H Both C and D are correct H 80: H D) H ●● H-C-C-C-H H E) H H H - 80: H ●● H -C-C-H 80: H

Decide whether the Lewis structure proposed for each molecule is reasonable or not. molecule proposed Lewis structure CIF 3 PF 4 O CI₂ :: : Cl .. :F: :F: | P :F: .. : 0: F : O о оо Is this a reasonable structure? If not, why not? 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: 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: 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: 0 * 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…

✔nk the elements or compounds in the table below in decreasing order of their boiling points. That is, choose 1 next to the substance with the highest Bolling puint, choose 2 next to the substance with the next highest boiling point, and so on. substance A B C D chemical symbol, chemical formula or Lewis structure H H-C-F: H :O: | || HIC-C-F: 1 H H H H :O: | || HIC-C-0-H F₂ boiling point ✓ (Choose one) 1 (highest) 2 34 4 (lowest) (Choose one) ✓ (Choose one) ✓ (Choose one) ✓