Questions from Chemistry

Q: Which of the following processes are exothermic? Select all that

Which of the following processes are exothermic? Select all that are True. crystallization vaporization melting sublimation

Q: Draw the Lewis dot structure for NaF CaO K2O

Draw the Lewis dot structure for NaF CaO K2O

Q: Is water a good buffering system? Please explain.

Is water a good buffering system? Please explain.

Q: Which of the following processes are exothermic? A. Rubbing

Which of the following processes are exothermic? A. Rubbing alcohol feels cold on the skin B. Molten metal solidifies C. A match burns

Q: Select the molecule or ion with the INCORRECT hybridization for the central

Select the molecule or ion with the INCORRECT hybridization for the central atom. a. IF2- sp b. 1F4+ sp3d c. IBr4- sp3d2 d. AsF3 sp3 e. Cl2CO sp2

Q: Dehydration of 2-methyl-2-pentanol forms one major

Dehydration of 2-methyl-2-pentanol forms one major and one minor organic product. Draw the structures of the two organic products of this reaction.

Q: CuO, ionic or molecular KI, ionic or molecular

CuO, ionic or molecular KI, ionic or molecular PCl3, ionic or molecular

Q: Which of the following chairs is galactose (Fischer projection drawn)?

Which of the following chairs is galactose (Fischer projection drawn)? Are these structures drawn in the alpha- or beta- configurations?

Q: What is the pH of a solution of 0.054 M

What is the pH of a solution of 0.054 M propanoic acid? The pKa of propanoic acid is 4.87.

Q: Determine the overall charge on each complex. a. hexachloroplatinate

Determine the overall charge on each complex. a. hexachloroplatinate(IV) b. triamminetriiodocobalt(III) c. diaquadichloroethylenediaminecobalt(III)