a. b.(CH3)2N C. d. OH e. (CH3)3N

Add lone pairs to the central atoms as necessary to complete the Lewis structures. Do not worry about the positions of the lone pairs on the central atom. Focus on the number of lone pairs. XEF2 SF, Erase Select Draw Rings More Erase Select Draw Rings More S F Xe Xe F :

9.

When pure sulfuric acid is dissolved in water, heat is evolved. 10.65 g of pure sulfuric acid at 20.00 °C was added to a calorimeter containing 300 g of water at 20.00 °C. The temperature of the solution increased to 26.35 °C. If the specific heat of the mixture is 4.184 Jg1°C1, the density of water is 1 g/mL, and the heat capacity of the calorimeter is ignored, what is the heat evolved per mole of sulfuric acid? a. -83.2 kJ O b. -73.6 kJ O C. -76.0 kJ d. -80.8 kJ e. -78.4 kJ